Answer:
C
Explanation:
it's about 20%-30%, so C would appropriately about that range since it the best answer :)
hope it helps
On the basis of their use and development, Natural resources can be classified as ________ and ________
Answer:
renewable , non-renewable
Explanation: natural resources can be classified as either renewable or non-renewable depending on whether or not they replenish naturally.
What is homeostasis? What are some of the things my body does to keep it at the right temperature?
Answer:
Blood flow to your skin increases to speed up heat loss into your surroundings, and you might also start sweating so the evaporation of sweat from your skin can help you cool off.As heat is lost to the environment, the body temperature returns to normal.
Why does each trophic level have a smaller amount of organisms or biomass than the one below it? A. Because higher trophic levels have lower survival rates for offspring. B. Because each trophic level has larger organisms than the one below it. C. Because the higher trophic levels have to hunt the lower trophic levels, so they- use most of the energy that they gain from eating. D. Because each trophic level is only absorbing 10% of the previous, so there is not enough energy to sustain larger numbers.
Each trophic level has a smaller amount of organisms or biomass than the one below it because it is only absorbing 10% of the energy from the lower level, so there is not enough energy to sustain larger numbers.
A trophic level refers to a level in the food chain consisting of the same or biologically similar organisms. Examples of trophic levels include producer, consumer, and decomposer.Organisms in the lower trophic level serve as food for organisms in the next trophic level of the food chain.Only about 10% of the energy derivable from one trophic level gets to the next trophic level, the remaining is lost as heat during metabolic processes.Hence, the number of organisms progressively decreases as we climb higher in the food chain. The limit to the amount of energy transferred as we move higher means that the number of individuals that can be sustained will also be limited.The correct option would, therefore, be D.
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DNA is a nucleic acid involved in heredity, or the passing down of genetic traits from one generation to the next. DNA consists of four different types of nucleotide monomers.Which part of the nucleotides' structure is responsible for the incredible variation that exists amongst all types of organisms
Nitrogenous base DNA consists of four unique nucleotides that each contain one unique nitrogenous base—adenine (A), thymine (T), cytosine (C), or guanine (G).
The specific arrangement of these four bases within the DNA of each organism gives that organism its unique traits; here are the arrangements:
-Adenine is paired with Thymine (think of A for apple and T for tree)
-Cytosine is paired with Guanine (think of C for car and G for garage)
search "DNA base pairs" and go to images for better understanding
The part of the nucleotides' structure is responsible for the incredible variation that exists among all types of organisms are Nitrogenous base DNA consists of four unique nucleotides that each contain one unique nitrogenous base—adenine (A), thymine (T), cytosine (C), or guanine (G).
Who is responsible for passing down of genetic traits from one generation to the next?DNA is a nucleic acid involved in heredity, or the passing down of genetic traits from one generation to the next. DNA consists of four different types of nucleotide monomers.
The specific arrangement of these four bases within the DNA of each organism gives that organism its unique traits and here are the arrangements are mentioned below:
Adenine is paired with Thymine (think of A for apple and T for tree)Cytosine is paired with Guanine (think of C for car and G for garage)Therefore, The part of the nucleotides' structure is responsible for the incredible variation that exists among all types of organisms are Nitrogenous base DNA consists of four unique nucleotides that each contain one unique nitrogenous base—adenine (A), thymine (T), cytosine (C), or guanine (G).
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How does disease and parasitism cause extinction?
Explanation:
Invading infectious diseases can, in theory, lead to the extinction of host populations, particularly if reservoir species are present or if disease transmission is frequency-dependent.
Answer:
Abstract. Infectious disease, particularly severe infectious disease, is widely recognized as a cause of biological population fluctuation or decrease. However, it is not usually thought to be a major factor in triggering species extinction or endangerment.
OAmalOHopeO
Which of the following is not a difference between photosynthesis and
cellular respiration?
A. Where they occur in cells
B. Being part of the carbon cycle
C. The products of the processes
D. The materials needed for the processes
Answer:
[tex]\boxed {\boxed {\sf B. \ Being \ part \ of \ the \ carbon \ cycle}}[/tex]
Explanation:
Photosynthesis and cellular respiration are both important processes to utilize energy and maintain life in an organism. There are many differences between the two, but we are asked to identify the answer that is not a difference.
A. Where they occur in cells
Photosynthesis occurs in chloroplasts in plants, algae, and some bacteria. Cellular respiration occurs in mitochondria in all organisms. This is a difference.
B. Part of the carbon cycle
The carbon cycle describes the exchange and movement of carbon throughout the Earth, atmosphere, and biosphere. Photosynthesis uses carbon dioxide and cellular respiration produces it, so they are both part of the carbon cycle. This is not a difference. This seems to be correct, but let's check the other choices.
C. The products of the processes
Photosynthesis produces oxygen and glucose, while cellular respiration makes carbon dioxide, water, and energy or ATP.
D. The materials needed for the processes
Photosynthesis needs carbon dioxide, water, and energy from the sun, while cellular respiration needs oxygen and glucose.
Both photosynthesis and cellular respiration are part of the carbon cycle, so the choice that is not a difference is Choice B.
grafting requires both a scion and a rootstock. true or false
Answer: true
Explanation: the upper part (scion) of one plant grows on the root system (rootstock) of another plant. In the budding process, a bud is taken from one plant and grown on another.
All of the following are true of spermatogenesis EXCEPT: Question 18 options: DNA replicates once, but cells divide twice. The products are spermatozoa that each have a head, midpiece and tail. Spermatids containing 23 chromosomes (1n) are produced. One spermatogonium produces 4 spermatids Genetically diverse spermatids are created.
Answer:
One spermatogonium produces 4 spermatids FALSE. One primary spermatocyte produces 4 spermatids.Explanation:
Germ cells are diploid reproductive cells in charge of gamete production. Germ cells divide by mitosis and meiosis. Through mitosis, they originate more sexual cells, but through meiosis, they produce gametes -sperm and egg cells-. This process is known as gametogenesis.
Gametes´destiny is to merge during fecundation, and a new diploid cell called zygote emerges through fertilization. The zygote is a complete cell and suffers successive mitosis to form the new organism.
Spermatogenesis is the process of production and maturation of sperm cells. Spermatogonia are the masculine diploid germ cells, carrying 46 chromosomes. These germ cells suffer mitosis to reproduce. Some of them stay as spermatogonia, and some others become primary spermatocytes, which are in charge of gamete production. Primary spermatocytes are also diploid cells, meaning that they still carry 46 chromosomes.
Each primary spermatocyte replicates its genetic material and then goes through meiosis I to produce two daughter haploid cells called secondary spermatocytes, each of them carrying 23 chromosomes. Each secondary spermatocyte will produce two other haploid daughter cells by meiosis II.
The total result from the two cellular divisions of each primary spermatocyte is four haploid daughter cells called spermatids.
During spermiogenesis, spermatids mature into spermatozoa or sperm cells. Each sperm cell characterizes by being composed of a head, midpiece, and tail.
DNA replicates once, but cells divide twice TRUE The products are spermatozoa that each have a head, midpiece, and tail TRUE Spermatids containing 23 chromosomes (1n) are produced TRUE One spermatogonium produces 4 spermatids FALSE. One primary spermatocyte produces 4 spermatids.Genetically diverse spermatids are created TRUEHow do make a sperm cell go in to a woman
What bug is this please help I found it on the ground and want to make it my pet I need answers ASAP what bug is this please
Which is our body part help us to maintain balance.
Answer:
cerebellum
Explanation:
The cerebellum is a small part of the brain positioned at the back of the head, where it meets the spine, which acts as the body's movement and balance control centre.
please mark me as brainliest
Tai không chỉ có vai trò để lắng nghe mà còn hỗ trợ trong việc giữ cân bằng
Which of the following changes to Earth is caused predominantly by living organisms?
A. The production of dirt.
B. The release of free nitrogen into the atmosphere.
C. The release of sulfur dioxide into the atmosphere.
D. The movement of air currents by convection cells.
The production of dirt is cause predominantly by living organisms
This production can be caused through emission of pollution in the form of air, water, soil, noise or e-waste.
What is Pollution?Pollution is defined as the introduction of unwanted harmful elements in the form of release of gaseous toxic substances which result into polluting the environment.
These pollutants can be both natural and anthropogenic.
Natural pollutants are volcanic ash, river sediments
Anthropogenic pollutants are chemicals released from industries vehicular emission.
Majorly pollution are of four types- Air, Water, Soil and Noise. Recently another pollution in the form of e-waste is also prominent.
Effects of pollution on environment:
1. Biomagnification describes situations where toxins (such as heavy metals) passes through trophic levels, becoming exponentially more concentrated in the process.
2. Carbon dioxide emissions cause ocean acidification, the ongoing decrease in the pH of the Earth's oceans as CO2 becomes dissolved.
3. The emission of greenhouse gases leads to global warming which affects ecosystems in many ways.
4. Nitrogen oxides are removed from the air by rain and affect the land which can change the species composition of ecosystems.
5. Smog and haze can reduce the amount of sunlight received by plants to carry out photosynthesis and leads to the production of tropospheric ozone which damages plants.
6. Sulfur dioxide and nitrogen oxides can cause acid rain which lowers the pH value of soil.
7. Organic pollution of watercourses can deplete oxygen levels and reduce species diversity.
Rest three options are majorly natural process.
Option B focuses on release of free nitrogen into atmosphere which is one of the important step of Nitrogen Cycle.
Option C focuses towards release of Sulfur Dioxide into atmosphere. This process is caused either naturally or anthropogenically. Thus cant blame solely the anthropogenic factor for its release.
Option C is the total natural process i.e. Climatological Process where air currents are regulated by Convection Cells and regulate based on different natural factors.
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Dephosphorylation of glycogen synthase: ____________
a. Increase in the concentration of inorganic phosphate ion
b. Increase in the activity of glycogen phosphorylase
c. Increase of ATP concentration
d. Decreasing glycogen synthesis Increasing glycogen synthesis
e. No effect on glycogen synthesis
Answer:
b. Increase in activity of glycogen phosphorylase.
Explanation:
Glycogen synthase exists in two forms which is phosphorylated form which is covalent modification of serine residues by ATP and dephosphoryated form which is obtained using phosphatase on phosphorylated form. Glycogen phophorylase catalyzes hydrolysis of glycogen which shortens glycogen molecules.
You are in charge of genetically engineering a new organism that will derive all of its ATP from sunlight by photosynthesis. Will you put the enzymes of the citric acid cycle in this organism
Answer:
Yes.
Explanation:
I will put the enzymes of the citric acid cycle in this organism so that in the absence of sunlight, it also produces energy to grow quickly. Citric acid cycle is a series of chemical reactions which release stored energy through the oxidation of acetyl-CoA derived from carbohydrates, fats, and proteins. This cycle is also called Krebs cycle so incorporation of this cycle is good for the organism.
2. What kind of plants contain tubular structures that are used to conduct water from the soil through the roots?
non-vascular plants
seedless plants
seed plants
vascular plants
Answer:
Vascular plants
Explanation:
I took the quiz
The pre-australopith fossils are especially significant because they challenge some of the long-standing explanations of our evolutionary history. Describe two reasons the pre-australopiths force us to rethink the savanna hypothesis in particular. (Hint: Think about the anatomical traits of the pre-australopiths and the environmental and temporal context in which they lived.)
Two important reasons are listed here:
- Pre-australopithecines show evidence of bipedalism but they lived in forested areas
- Ardipithecus ramidus is a human ancestor that lived in a wooded environment approximately 4.2 to 4.5 million years ago
The savanna hypothesis states that early hominid traits were selected in response to increased aridity conditions and the emergence of savanna landscapes (i.e., open grasslands), as forests receded. This hypothesis enables us to understand better the evolution of bipedalism.
Pre-Australopithecines represent the oldest hominids that date from at least 7 to 4.4 million years ago (mya), depending on the species. Pre-australopithecines show evidence of bipedalism (and/or dentition similar to the later hominins who exhibit bipedalism), but it has been shown that they lived in forested areas. Therefore, this observation contradicts the savanna hypothesis which states that bipedalism evolved as an adaptation to the savanna.
Ardipithecus ramidus is a human ancestor dating to between 4.5 and 4.2 mya. The Ardipithecus ramidus fossils were discovered in Ethiopia alongside faunal remains, thereby indicating they lived in a wooded environment. In consequence, Ardipithecus ramidus fossils contradict the open savanna explanation for the origin of bipedalism.
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What is the relationship between coronary artery disease and a heart attack?
A. Coronary artery disease is a symptom of heart attacks.
B. Heart attacks reduce blood flow to the heart and cause coronary artery disease.
C. Coronary artery disease can reduce blood flow to the heart and cause heart attacks.
D. Heart attacks occur when coronary artery disease is treated.
C) Coronary artery disease can reduce blood flow to the heart and cause heart attacks
CAD (or atherosclerosis) affects the vessels that supply blood to the heart muscle. It is caused by deposits of calcium, fat, cholesterol and fibrous tissues, which makes the lumen of arteries narrower. And due to inadequate supply of blood, the heart muscles get damaged. This can lead to a heart attack!
A genetically heterogeneous population of rice has a mean in the number of days to maturation of 30. Selection for decreased period of maturation is carried out for one generation. The average period to maturation among the plants selected as parents for the next generation is 25 days. F1 plants mature on average in 27 days. Estimate the narrow sense heritability.
Answer:
h² = 0.6
Explanation:
Before answering the question, we need to know a few concepts.
Artificial selection is the selecting practice of a specific group of organisms in a population -that carry the traits of interest- to be the parents of the following generations.
Parental individuals carrying phenotypic values of interest are selected from the whole population. These parents interbreed, and a new generation is produced.
The selection differential, SD, is the difference between the mean value of the trait in the population (X₀) and the mean value of the parents, (Xs). So,
SD = X₀ - Xs
Heritability in the strict sense, h², is the genetic component measure to which additive genetic variance contributes. The heritability might be used to determine how the population will respond to the selection done, R.
h² = R/SD
The response to selection (R) refers to the metric value gained from the cross between the selected parents. R can be calculated by multiplying the heritability h², with the selection differential, SD.
R = h²SD
R also equals the difference between the new generation phenotypic value (X₁) and the original population phenotypic value (X₀),
R = X₀ - X₁
-------------------------------------------------------------------------------------------------------------
Now that we know these concepts and how to calculate them, we can solve the proposed problem.
Available data:
You are selecting rice´s decreased period of maturation. The population of rice has a mean maturation time of 30 days → X₀ Parental selected average period to maturation is 25 days → Xs F1 plants mature on average in 27 days → X₁ N arrow sense Heritability → h²According to what we sow previously, we need to find out the value of h².
We know that h² = R/SD, so we need to get R and SD first.
R = X₁ - X₀
R = 27 - 30
R = -3
SD = Xs - X₀
SD = 25 - 30
SD = -5
Knowing this, we can calculate h²
h² = R/SD
h² = -3/-5
h² = 0.6
Importance of antimicrobial emulsion
Answer:
Citral is a typical essential oil used in the food, cosmetic, and drug industries and has shown antimicrobial activity against microorganisms. Citral is unstable and hydrophobic under normal storage conditions, so it can easily lose its bactericide activity. Nanoemulsion technology is an excellent way to hydrophilize, microencapsulate, and protect this compound. In our studies, we used a mixed surfactant to form citral-in-water nanoemulsions, and attempted to optimize the formula for preparing nanoemulsions. Citral-in-water nanoemulsions formed at So 0.4 to 0.6 and ultrasonic power of 18 W for 120 seconds resulted in a droplet size of < 100 nm for nanoemulsions. The observed antimicrobial activities were significantly affected by the formulation of the nanoemulsions. The observed relationship between the formulation and activity can lead to the rational design of nanoemulsion-based delivery systems for essential oils, based on the desired function of antimicrobials in the food, cosmetics, and agrochemical industries.
An enzyme, Pittpantherase, has a KM of 8mM. At a substrate concentration of 4mM, the velocity of the reaction was 2mM/min. What is Vmax for this enzyme
Answer: [Vmax]= 6mM/min.
Explanation:
Enzymes are proteins that produce a specific chemical change in a substance, called substrate, resulting in a product. By following the rate of product appearance (or disappearance of the substrate) as a function of time, the kinetics of the reaction is obtained. As the reaction proceeds, the rate of product formation decreases and the substrate is consumed.
The rate [V] indicates the amount of substrate that is converted into product per second. With increasing substrate concentrations [S], the enzyme approaches its maximum velocity [Vmax], but does not reach it. For this reason, there is no specific value of [S] for Vmax. However, a characteristic parameter of the enzyme can be defined using the substrate concentration at which half of the maximum velocity (Vmax/2) is reached. The initial velocity of the reaction is equal to the slope of the zero-time forward curve and is measured before 10% of the total substrate is consumed, so that the substrate concentration can be considered as essentially constant throughout the experiment. So, although it is impossible to measure exactly the substrate concentration that gives Vmax, enzymes can be characterized by the substrate concentration at which the reaction rate is half the maximum rate. This substrate concentration is known as the Michaelis-Menten constant (KM). For enzymes exhibiting simple Michaelis-Menten kinetics this constant represents the dissociation constant of the enzyme-substrate complex (or the inverse of the enzyme-substrate affinity). Thus, Km indicates the affinity of the enzyme for its substrate, since the higher the Km the lower the affinity. And the lower the Km the higher the affinity.
The formula for the calculation is as follows:
[tex]V_{0}= \frac{[Vmax] x [S]}{[S]+[KM]}[/tex]
So if we replace the numbers, we get:
[tex]2mM/min= \frac{[Vmax] x [4mM]}{[4mM]+[8mM]}[/tex]
If we clear the equation, we obtain that [Vmax]= 6mM/min.
Anaerobic Respiration of Yeast
1. Describe at least one part of the experiment procedure you thought was
essential for getting good results. Did you find that certain steps in the
procedure had to be followed carefully to get consistent results? If you wanted
better results, do you think there is a step that could have been added to the
procedure?
2. Discuss your thoughts on the overall lab design. Did it help you understand the
concepts better, or did it raise more questions? Do you think you could have
designed a better experiment? If so, explain how and then discuss it with your
classmates. Share some of your knowledge with them to learn a little more
about this experiment.
Anaerobic respiration of yeast produces ethanol and carbon dioxide, which can be experimentally tested by determining the rate of CO2 production in a closed system.
What is anaerobic respiration?Anaerobic respiration is a series of chemical reactions by which certain organisms can produce energy (ATP) in absence of oxygen.
Anaerobic respiration is useful in experimental settings to determine the survival rate of yeast, which can be determined by measuring the concentration of products of this process.
The experimental procedure requires the use of a closed system to determine the rate of change between reactants (glucose) and products (ethanol + carbon dioxide).
In conclusion, Anaerobic respiration can be experimentally tested by determining the rate of CO2 production.
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chất xám trong trung ương thần kinh được cấu tạo từ đâu
Answer:
Chất xám được cấu tạo chủ yếu bởi thân của các nơ ron đóng vai trò trung tâm của các phản xạ tủy.
Explanation:
what is the waterfalls
Answer:
waterfall is a falling of a river or other body of water over a steep Rocky ledge. Shows interruption in water flow
Which statement best describes a line graph?
A. It shows a line passing through scattered data points.
B. It shows a line that connects a series of data points.
C. It shows data as proportions of a whole.
D. It shows the locations of errors in data.
Answer:
B
Explanation:
I just did it
A line graph shows a line that connects a series of data points
what is line graph ?A line graph is a unique type of graph which is used in statistical application which represents the change in a quantity with respect to another quantity.
The price of different flavors of chocolates varies which can be represented, these variation is plotted in a two-dimensional XY plane.
If the relation include two measures can be presented by using a straight line in a graph called as linear graphs or a linear graph.
There are different types of the line graph, Simple Line Graph refers to Only one line is plotted on the graph, Multiple Line Graph where More than one line plotted on the same set of axes.
Compound Line Graph refers to the information can be divided into two or more types of data and this line graph is called a compound line graph which can be drawn to show the component.
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what is the difference of biology and human and social biology ???
Biology is the branch of science.
Human biology is the branch of biology that focuses on human beings and human population.
Social biology is the branch of biology that is the study of social behaviour of animal and human.
Answer:
Biology is the study of living things.
Social biology studies human and animal behaviour.
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Explanation:
What distance was covered by the bicycle during the 10 seconds?
A conservation biologist is working to protect elephant seal populations. Elephant have a classic type I survivorship curve with very low levels of juvenile mortality and high survivorship rate. They insist that reducing threats to adults is more important than protective juveniles. Are they correct
Answer:
Elephants and Classic Type I Survivorship Curve
The conservation biologist is correct.
Explanation:
Classic type 1 survivorship curve means that mortality of elephants increases as they age, and their fecundity (or fertility) decreases as they age. Therefore, reducing the threats to adults should be more important than protecting the younger elephants. The younger elephants have higher rates of survival and fecundity than their older parents.
What are the effects of Speciation & Extinction on biodiversity
Answer:
Specitation increases biodiversity, while extinctions decrease biodiversity.
Explanation:
Biodiversity is the variety of life on Earth or some specified geographic area of the planet; the diversity of life occurs at the genetic level, at the species level, at the ecosystem level, and in evolutionary lineages.
Answer:
The same factors that increase the risk of species extinctions also reduce the chance that new species are formed. We often see alarming reports about the global biodiversity crisis through the extinction of species. The reasons why species become extinct is much discussed, particularly the consequences of human activities. Less often discussed is how environmental changes affect the chances that new species are formed.
which life cycle stage is found in plants but not animals
Answer:
Multicellular haploidOAmalOHopeO
Plants have multicellular haploid and multicellular diploid stages in their life cycle.
Gametes develop in the multicellular haploid gametophyte . Fertilization gives rise to a multicellular diploid sporophyte, which produces haploid spores via meiosis.What is multicellular haploid stage?The haploid multicellular stage produces specialized haploid cells by mitosis that fuse to form a diploid zygote.The zygote undergoes meiosis to produce haploid spores. Each spore gives rise to a multicellular haploid organism by mitosis.To know more about diploid stage here
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I need help with the work
Answer:
Gw
Explanation:
