The electron microscope uses a beam of electrons for magnifying the real image of an object. While the light microscope uses visible light to magnify the images of miniature substances or biological specimens.
What do you mean by Microscope?A microscope may be defined as an instrument that is to be used to magnify small objects such as biological cells, minerals samples, etc.
Electron microscopes have a higher level of magnification and a threat of radiation leakage as compared to the light microscope. In the electron microscope, image formation relies on the scattering of electrons while it depends on light absorption in the light microscope.
The electron microscope offers high resolution and is thus expensive as compared to the light microscope.
Therefore, it is well described above.
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what do Greenland and the united states have in common (A they are both located in North America) (B they are both located in the pacific ocean) ( C they are both islands) D they are both conidents)
Answer:
A. They are both located in North America
Explanation:
A. Although it is a European country, Greenland is physically a part of North America.
B is not correct because, while it borders the Pacific Ocean on the West Coast, The US is not in the Pacific Ocean. Greenland lies between the North Atlantic and Arctic Oceans.
C is not correct because the United States is not an island.
D is not correct because neither one is its own contintent.
genes code for the production of ________ which can control traits.
Answer:
protein
Most genes contain the information needed to make functional molecules called proteins. (A few genes produce regulatory molecules that help the cell assemble proteins.) The journey from gene to protein is complex and tightly controlled within each cell.
List the region or countries the majority of African elephants inhabit
Answer:
Explanation:
African elephants primarily inhabit the Democrtic Republic of the Congo and close surrounding areas.
Write a paragraph explaining how genetic variation, reproductive strategies and environmental pressures have impacted the survival of populations. Identify a specific example for each in your discussion.
Answer: Genetics and Pressures
Explanation:
For natural selection to occur, a population must have a wide variety of individuals with different traits. For example, natural selection would not influence fish body color if all individuals in a population were exactly the same color. Variation of scale color can help a fish species have a higher chance of survival by confusing predators as to what species they are.
Reproductive strategies represent a set of behavioral, morphological, and physiological adaptations that facilitate access to potential mates, improve the chances of mating and fertilization, and enhance infant survival. Male peacocks have bright, big tail feathers, for example, to attract females. If an organism has a high appeal, this will make them more likely to be able to meet and continue the survival of the species.
Environmental pressures, such as plant death, could influence the survival of herbivorous organisms. Say a small land creature consisted off grass, and an epidemic killed all the grass in their region. They would either die off, or they would evolve to find different types of food. The former could reduce population, while the latter could increase it.
12 Which does not produce carbon dioxide?
A a muscle fibre
B a sensory neuron
C blood
D saliva
Describe the relationship between a thermal inversion and pollution.
Answer:
With a stronger inversion (greater thermal difference between inversion and mixing layers), less pollution can disperse into higher atmospheric levels. Likewise, the longer an inversion lasts, the more pollution will build up, and the worse the air quality in the mixing layer will be
Explanation:
WILL MARK BRAINLIEST!
Suppose you are testing different sols to determine which grows healthier bean plants. You count and record the number of leaves on each test every three days for six weeks. What type of
graph would be best to display your data?
A. Bar graph
B. Line graph
C. Circle graph
D. Scatter plot
Answer:
A line graph would be best to display the data.
Answer:
Line graph im pretty sure!! <3
Explanation:
Has biodiversity changed in the desert over time?
Why do large-scale convection currents occur in the atmosphere?
Explanation:
Convection drives the circulation of air in the earth's atmosphere. The sun heats the air near the earth's equator, which becomes less dense and rises upward. As it rises, it cools and becomes less dense than the air around it, spreading out and descending toward the equator again.
Which of the following is NOT a result of global warming?
(societal conflicts)
(sea-level rise)
(loss of biodiversity)
(ozone depletion)
Ozone depletion is NOT a direct result of global warming. While both global warming and ozone depletion are environmental concerns, they are caused by different factors and have distinct impacts.
Global warming is primarily caused by the increased concentration of greenhouse gases in the atmosphere, trapping heat and leading to a rise in global temperatures. It results in a wide range of consequences, including the melting of polar ice caps, rising sea levels, extreme weather events, shifts in ecosystems, and the potential loss of biodiversity as species struggle to adapt to changing conditions.
On the other hand, ozone depletion is mainly caused by the release of certain chemicals known as ozone-depleting substances (ODS) such as chlorofluorocarbons (CFCs) and halons. These substances break down ozone molecules in the stratosphere, leading to the thinning of the ozone layer. Ozone depletion primarily affects the stratospheric ozone layer, which shields the Earth from harmful ultraviolet (UV) radiation. The thinning of the ozone layer can have detrimental effects on human health, ecosystems, and agricultural productivity.
Therefore, while global warming and ozone depletion are both significant environmental issues, ozone depletion is not a direct result of global warming.
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One can tell how fast a molecule is moving by measuring its
a. shape
b. volume
c. temperature
d. mass
Answer: d. mass
Explanation: just tookthe test.
True or false? swallowing has both voluntary and involuntary components.
Answer:
true po
Explanation:
pabrainlist thx tama po yan
Immediately after ovulation, the ruptured follicle transforms into this temporary endocrine gland
Immediately after ovulation, the ruptured follicle transforms into a temporary endocrine gland known as the corpus luteum.
What do you mean by Ovulation?Ovulation may be defined as the process through which the egg is released by the ovary during the menstrual cycle.
The corpus luteum is known as the endocrine gland because it synthesizes the hormone progesterone which makes the uterus healthy for a developing fetus.
Therefore, immediately after ovulation, the ruptured follicle transforms into a temporary endocrine gland known as the corpus luteum.
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how can muscle and nervous tissue be used in postmortem analysis?
Answer:
by checking if the muscles are injured
Construct and revise an explanation of how macromolecules are used in the body. Use as much details as possible.
how do muscles get the energy they need to function
Answer:
Muscles use the stored chemical energy of food we eat and convert that to heat and energy of motion (kinetic energy). We need energy to enable growth and repair of tissues, to maintain body temperature and to fuel physical activity. Energy comes from foods rich in carbohydrate, protein and fat
Explanation:
What phase of mitosis is highlighted in the slide below?
Metaphase
Telophase
Anaphase
Prophase
From which of the following does the basic structure of hair and nails form?
a.
sweat
c.
collagen
b.
melanin
d.
keratin
Answer: D. Keratin
Explanation: Keratinocytes (pronounced: ker-uh-TIH-no-sites) make keratin, a type of protein that's a basic component of hair, skin, and nails. Keratin in the skin's outer layer helps create a protective barrier.
Planet A has a tilt a of five degrees. What seasonal changes would be expected on this planet?
Extreme temperature changes between seasons
Little to no change in temperatures between seasons
Seasonal changes along the equator only
Seasonal changes at the poles only
Answer:
B. Little to no change in temperatures between seasons.
Assuming planet A is the earth, the earth is very slightly rotated on its axis toward the sun and Jupiter, so there would not be a dramatic change if we tilted the earth 5 degrees.
Almost 40% of the world population and many ecosystems are suffering from water scarcity. Many actions taken in the past have led to the water shortage being experienced today. Evaluate each of the factors listed below. All of these have led to water scarcity EXCEPT: A) sea-level rise B) population growth agricultural demand D) climate change, including drought
Answer:
Water scarcity already affects every continent. Around 1.2 billion people, or almost one-fifth of the world's population, live in areas of physical scarcity, and 500 million people are approaching this situation. Another 1.6 billion people, or almost one quarter of the world's population, face economic water shortage (where countries lack the necessary infrastructure to take water from rivers and aquifers).
Water scarcity is among the main problems to be faced by many societies and the World in the XXIst century. Water use has been growing at more than twice the rate of population increase in the last century, and, although there is no global water scarcity as such, an increasing number of regions are chronically short of water.
Water scarcity is both a natural and a human-made phenomenon. There is enough freshwater on the planet for seven billion people but it is distributed unevenly and too much of it is wasted, polluted and unsustainably managed.
Explanation:
Which planet has a temperature range of 400C to -200C?
Answer:
Mercury and Venus
Explanation:
A species was added into a particular ecosystem to control the population of a prey species. This method of introducing a new species is called. The population of the added species increased, leading to an imbalance in the ecosystem. This increase happened because.
The process of introducing a new species into an ecosystem is called bioremediation. The introduced species is called invasive species.
What do you mean by Ecosystem?An ecosystem may be defined as a place or an area where members of different species or communities live together and interact with one another for the purpose of food, shelter, space, and other resources.
The population of the invasive species enriched, directing to an imbalance in the ecosystem. This accumulation happened because the amount of resources increased in the ecosystem.
Therefore, it is well described above.
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Answer:
bioremediation
the amount of resources increased in the ecosystem
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Where does alcohol get absorbed into your bloodstream?
Before complex development of a fetus can begin, implantation into the uterine wall must occur. What gets implanted in the uterine wall?
Answer:
Embryo
Explanation:
A egg cell is fertilised to form a zygote which is diploid(contains two sets of chromosomes) and then it divides again and again into a ball of cells by mitosis and then it is implanted
I need help with number 1 and 2
Answer:
Read the Explanation below.
Explanation:
1. I agree with the claim because you can see overall there is no difference in plant growth or variation if a plant has 30 ml of water or none at all.
2. I would measure the change in growth over a greater period of time to get a more accurate data set.
Explain how dna polymerase chooses which nucleotides to put into the new strand. Be specific and detailed in your explanation of how this selection is accomplished to make the correct dna molecule
DNA polymerase adds nucleotides at the 3' primer end of the DNA. This DNA polymerase checks the newly added base has correctly paired with the base in the template strand or not. Based on this it adds the new nucleotide.
What is nucleotide?Nucleotide is the nucleoside with a phosphate group. It generally stack or link with each other to make a polynucleotide chain.
DNA polymerase adds these nucleotides one by one to the 3' primer end on the DNA strand.
It usually checks the correct pairing of the base with the template strand and then adds the new nucleotide to it.
Thus, by this step DNA polymerase choose nucleotides to put into the new strand.
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Describe 2 issues affecting Agriculture today and provide your opinion about how we should address them.
Answer: The lack of support: The government increases support for agriculture for the people and those who do the work and they do not spend as much with the increased support.
Agricultural training:
Agricultural training is necessary to acquire recent knowledge and replace obsolete or harmful techniques for the ecosystem, supply food to the population in quantity and quality, enter new markets and preserve natural resources for future generations.
Explanation:
Why is knowing agricultural statistics, background information, and soil characteristics about the territory in which your farm is located important?
Knowing the agricultural statistics of where your farm is located is important because it can help a farmer to identify the efficiencies that will lead to more productivity and profitability, less input costs, and optimized fertilizer use. The background information is important to farmers because it helps a farmer know whether or not the ground is good for growing crops, if something had happened to the land before their use. Soil characteristics are important to farmers because fertile soil is important for crop growth. The soil needs to be able to allow water and air to infiltrate, roots to be able to move more, and for biota to be able to thrive.
Part of an mRNa strand has 9 nucleotide bases. How many amino acids does this strand code?
A. 2
B. 6
C. 9
D. 3
Answer:
It would code for 3 amino acids.
Explanation:
Three nucleotide bases code for one amino acid.
e.g: AUG codes for methionine
or GUG codes for valine.
how do births and deaths in a population affect its size?
Answer:
it doesn't affect size directly but affect no. as when death increase the offsprings increases to compensate its loss ,as cell doesn't live much it doesn't take enough nutrition so for your question it does affect but not a distinctive theory
