Answer:
Four major landforms are
A) Mountains B) hills C) plains D) plateaus
Explanation:
I hope this helps you out a little!
bones are moved by _____ muscles. these muscles are attached to bones by ________ and they work in ______ pairs. hen one muscles in pair _______ the other _______ and bones are _______ in a particular direction. muscles cell contain many ______ which release energy for movements.
fill in the blanks plz.
these are the word that want to come to those blanks
involuntary , relaxes , mitochondria , contracts , antagonistic , pushed , ligaments , pulled , ribosomes , muscles , tendons , voluntary.
Answer:
voluntary
tendons
antagonistic
contacts
relaxes
pushed
mitochondria
hope it helps
the words are in order starting from the top to the last one
How many hydrogen atoms are there in the molecule H2S04?
O A. 1
B. 3
C. 4.
O D. 2
Answer:
two hydrogen atom
Explanation:
Sulfuric Acid, H2SO4 is a chemical compound made up of two hydrogen atom, one sulfer atom, and four oxygen atoms.
Some of the typical properties of cancer cells are: (1) Self-sufficient growth and proliferation, (2) Defects in intracellular control mechanisms that normally arrest or permanently stop cell division in response to stress or DNA damage, (3) Ability to escape from home tissues (invasiveness) and to survive and proliferate in foreign sites (metastatic ability), and (4) Instability of the genome. True or False
Answer:
True
Explanation:
Cancer cells are abnormal cells that divide aggressively to form solid tumors, thereby differing from normal cells. Cancer cells do not need any stimulation to multiply them, i.e., they can synthesize their own growth factors that trigger uncontrolled cell proliferation. Mutations in genes associated with the progression through the cell cycle and programmed cell death (i.e., apoptosis) are a well-known hallmark of cancer cells. The mutated genes can be either 1-tumor suppressor genes that slow down cell division and repair DNA mistakes or 2-proto-oncogenes that normally help cells grow, and whose mutations cause normal cells to become cancerous (oncogenes are mutated forms of proto-oncogenes). Cancer cells are characterized by their invasiveness and metastatic potential, i.e., their ability to spread to healthy surrounding tissues through the lymph system and/or bloodstream, where these cells proliferate and produce new tumors. Finally, genomic instability, i.e., the increased susceptibility of cells to acquire and spread mutations at the genome level, is also a hallmark of cancer cells. Genomic instability results from damage to genes that regulate cell division and tumor suppressor genes.
When plasma Ca concentration decreases... 1. Parathyroid hormone level increases 2. Parathyroid hormone level decreases 3. Ca and phosphate reabsorption increases 4. Ca and phosphate reabsorption decreases 5. Ca reabsorption decreases and phosphate reabsorption increases 6. Ca reabsorption increases and phosphate reabsorption decreases
Answer:
2. Parathyroid hormone level decreases
4. Ca and phosphate reabsorption decreases
Explanation:
When plasma Ca concentration decreases, the action of Parathyroid hormone level decreases which leads to Calcium and phosphate reabsorption decreases. Parathyroid hormone is responsible for the increase of calcium and phosphorus in the blood when there is low level in the blood so when the re is huge amount of calcium and phosphorus in the blood, the Parathyroid hormone activity decreases which decrease the reabsorption of calcium and phosphorus decreases.
diffrences between pine tree and mango tree
well ones a pine tree, and ones a mango tree
Answer:
A:pine tree is also know as Christmas tree
Explanation:
B:mango tree is broad andextremly big
Hormones are _____. See Concept 45.1 (Page) View Available Hint(s)for Part A signals that must interact with DNA in order to be effective chemical signals between cells, transported in blood or hemolymph always proteins are all under the control of the pituitary gland produced only in response to environmental stress
Answer:
The correct answer is - chemical signals between cells, transported in blood or hemolymph
Explanation:
Hormones are chemicals that make communication between cells and transfer the signals to various target cells. These are transported through the blood and lumph in their respective circulation so signals can reach to the surface or within the target cells and perform specific functions.
Which of the following is the correct Lewis structure diagram for Sodium (Na)? (2 points)
Select one:
a. The letters Na with one dot
b. The letters Na with two dots
c. The letters Na with three dots
d. The letters Na with four dots
Answer:
a. The letters Na with one dot
Explanation:
An atom can be defined as the smallest unit comprising of matter that forms all chemical elements. Thus, atoms are basically the building blocks of matters and as such determines or defines the structure of a chemical element.
Generally, atoms are typically made up of three distinct particles and these are protons, neutrons and electrons.
In Chemistry, electrons can be defined as subatomic particles that are negatively charged and as such has a magnitude of -1.
Valency can be defined as a measure of the combining power of a chemical element with other atoms to form a molecule or chemical compound.
Valence electrons can be defined as the number of electrons present in the outermost shell of an atom. Thus, valence electrons are used to determine whether an atom or group of elements found in a periodic table can bond with others.
Sodium is a chemical element that is found in group (1) of the periodic table and as such it has 1 electrons in its outermost shell. Also, the chemical symbol for Sodium is Na and it has one (1) valence electron.
A Lewis structure can be defined as a structural representation of an atom or molecule by using a dot to show the position and distribution of electron(s) around the atom or molecule.
Hence, the letters Na with one (1) dot is a correct Lewis structure diagram for Sodium (Na) because it has just one (1) valence electron in outermost shell.
For example, the Lewis structure diagram for Sodium (Na) is •Na.
Answer:
Na with 1 dot
Explanation:
i took the test
what is cell differentiation?
Answer:
The process through which a cell transforms from one cell type to another is known as cellular differentiation. In most cases, the cell transforms into a more specialized form. As a multicellular organism develops from a basic zygote to a complex system of tissues and cell types, it undergoes many stages of differentiation.
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All of the following are arguments used by global warming skeptics except
(A) climate models for global warming have continually been wrong
(B) the dire consequences of global warming have not come pass
(C) earth has natural temperature cycles it goes through
(D) an increase in temperatures would actually be good for the climate
Explanation:
the answer is b because the consewuences of global warming had not yet pass
Answer: D
Explanation: No climate change deniers think that climate change is good for the the planet, they just deny that climate change exists
urgent help please just guess Mosquitoes are small flying insects which are very harmful.
It is only female mosquitoes that bite people. Male mosquitoes do not consume blood.
Blood serves as a source of protein for their eggs.
can anyone suggest a title please and do not suggest introduction please
Answer:
The difference between Male and Femal mosquitoes
Explanation:
Answer:
characteristics of make and female mosquitoes
pls help ill give brainlist!!!!!!!!!
Answer:
Explanation:
Mitochondria are membrane-bound cell organelles (mitochondrion, singular) that generate most of the chemical energy needed to power the cell's biochemical reactions. Chemical energy produced by the mitochondria is stored in a small molecule called adenosine triphosphate (ATP).
A vacuole is a membrane-bound cell organelle. In animal cells, vacuoles are generally small and help sequester waste products. In plant cells, vacuoles help maintain water balance
Lysosomes function as the digestive system of the cell, serving both to degrade material taken up from outside the cell and to digest obsolete components of the cell itself
Centrioles play a role in organizing microtubules that serve as the cell's skeletal system. They help determine the locations of the nucleus and other organelles within the cell.
The cell wall surrounds the plasma membrane of plant cells and provides tensile strength and protection against mechanical and osmotic stress. It also allows cells to develop turgor pressure, which is the pressure of the cell contents against the cell wall.
The cytoplasm is responsible for holding the components of the cell and protects them from damage. It stores the molecules required for cellular processes and is also responsible for giving the cell its shape.
You transcribed DNA to make
and built a sequence of amino acids through
Answer:
You transcribe DNA to make mRNA and built a sequence of amino acids through translation.
Hope it helps!
The structure of the cell membrane was discovered in 1895 by _________. Finding a similarity to Olive Oil, he discovers membranes are made of __________.
A. Charles Overton, amino acids
B. Gorter and Grendel, amino acids
C. Charles Overton, lipids
D. Irving Langmuir, lipids
The structure of the cell membrane was discovered in 1895 by Charles Overton . Finding a similarity to Olive Oil, he discovers membranes are made of lipids. Thus option C is correct.
What is cell membrane structure ?The cell membrane is primarily composed of a mix of proteins maintain the chemical climate of cell and lipids provide flexibility to membrane.
In lipid bilayer, phospholipids are the major component has hydrophilic head face to the aqueous cytosol and the extracellular fluid, where hydrophobic tail areas face opposite to cytosol.
Other types of lipid like cholesterol selectively dispersed in animal cell membranes.
Glycolipids present on the surface of cell membrane bind with a sugar chain , it help in recognition of other cells.
Major types of membrane proteins are peripheral membrane proteins exposed to exterior and Integral membrane proteins are present inside the membrane, some portion are transmembrane proteins are present on both sides.
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Explain the relationship of the structure of cell membrane molecules to the function of the cell membrane overall. You must discuss the structure/function relationship of at least 3 different molecules that compose the cell membrane.
Help me please
Answer:
to protect the cell from its surroundings
Explanation:
I double checked my notes
Explain how 2 polynucleotides can twist helically around each other to form a double helix of DNA?
Explanation:
The antiparallel arrangement of the two strands is what causes the twist. Because the strands run in opposite directions, they pull the sides of the molecule in opposite directions, causing the whole thing to twist around itself. Most naturally occurring DNA spirals clockwise.What can young people do about climate change?
Imagine you do a test cross between a purple-flowered pea plant having serrated leaves (a dominant trait) and a white-flowered pea plant having smooth edges. If the purple-flowered plant is heterozygous for both traits, the expected ratio in the offspring is 1 purple-serrated:1 purple-smooth:1 white-serrated:1 white-smooth. Instead, you see 4 purple-serrated:1 purple-smooth:1 white-serrated:4 white-smooth. What is the explanation of this ratio
Answer:
genes for flower color and edge shape are linked. They do not assort independently.
Explanation:
Available data:
test cross between a purple-flowered pea plant having serrated leaves and a white-flowered pea plant having smooth edges.serrated leaves → dominant trait smooth edges → recessive traitpurple color → dominant traitwhite color → recessive traitF1: 4 purple-serrated:1 purple-smooth:1 white-serrated:4 white-smooth.There are two genes involved in the cross. The expected ratios are 1:1:1:1 because we assume genes assort independently. However, we see a different phenotypic distribution. When phenotypic ratios differ from the expected ones, it means that genes are linked.
To know if two genes are linked in the same chromosome, we must observe the progeny distribution. If individuals, whose genes assort independently, are test crossed, they produce a progeny with equal phenotypic frequencies 1:1:1:1. But if instead of this distribution, we observe a different one, that is that phenotypes appear in different proportions, we can assume that genes are linked in the double heterozygote parent
draw a flowchart showcasing the process of scientific learning .also mention a short description of each of the step in the chart.
Answer:
The scientific method is a system of exploring the world around us, asking and answering questions, and making predictions. Scientists use the scientific method because it is objective and based on evidence. A hypothesis is fundamental to the scientific method. A hypothesis can take the form of an explanation or a prediction. There are several ways to break down the steps of the scientific method, but it always involves forming a hypothesis, testing the hypothesis, and determining whether or not the hypothesis is correct. If the hypothesis is rejected, this does not mean the experiment was a failure. In fact, if you proposed a null hypothesis (the easiest to test), rejecting the hypothesis may be sufficient to state the results. Sometimes, if the hypothesis is rejected, you reformulate the hypothesis or discard it and then go back to the experimentation stage.
The process of scientific learning refers to the various steps via which one can examine and study our environment to understand it. Once understanding or know-how is achieved, then technology is said to have advanced further.
It starts with making observations. Now because of the limitation of our senses, it is important not to jump to conclusions. The next step is to form a hypothesis based on the observation madeWhen you have arrived at a hypothesis, you can now carry out a controlled experiment where you collect further data and reach conclusions based on the experimentIf the hypothesis is in line with your observation, you publish resultsIf the hypothesis is null, you also publish results, then review your hypothesis and repeat the experimentAll the above require consistent documentation at each stage. Please see the attached image for the flowchart.
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A change in the water availability of an area made it lose certain species, reverting the area to an earlier serial stage. Which of the following is described by this scenario?
Answer:
Ecological succession.
Explanation:
Ecological succession occurs in this scenario because the area is changing again to its original or starting stage due to change in its environmental conditions. Those plants that needs large amount of water will vanished and those plants that needs less water will take the place of that plants. This phenomenon also occur with other animals that living in that ecosystem.
which gases does NOT contribute to greenhouse effect?
Answer:
Carbon monoxide is not a primary greenhouse gas. It contributes in a relatively small way directly to the greenhouse effect.b) Describe two measures each to conserve natural vegetation and wildlife, Class 8 - Geography - Unit 1 betwen 90to100 words
Answer:
Afforestation and national sanctuaries are two measures each to conserve natural vegetation and wildlife.
Explanation:
The natural vegetation and wildlife restoration is one of the main concerns that are essential for the development and growth of a country's biodiversity. Due to human land-use changes and migration of people, from one place to another with their cattle, lands are becoming deserted and grassland and forest land are declining.
So, we need to plant more trees that act as the natural habitat for the wildlife and preserve and conserve them in parks and sanctuaries which will help reduce the impacts of global warming and climate change. We should not kill any animal.We should decrease the use of plastics.state and explain five factors that determine energy requirements in human beings
Answer:
Basal metabolism, Physical activity, Growth, Pregnancy and Lactation.
Explanation:
Basal metabolism, Physical activity, Growth, Pregnancy and Lactation are the five factors that determine energy requirements in human beings. To perform daily physical activities, we need a lot of energy which can be taken through breaking of food molecules as well as stored form of macromolecules such as fats and proteins etc. Energy is also needed for the metabolism and growth in humans beings because metabolism and growth processes needs energy.
Which of the following workers is a maintenance staff member?
Give an summary of the process occuring in the diagram.
What process is this?
What are the jobs of rRNA, mRNA and tRNA?
What is the end product of the process?
Answer the question using complete sentences and the diagram.
Answer:
- I believe transcription.
- Messenger RNA (mRNA) molecules carry the coding sequences for protein synthesis and are called transcripts; ribosomal RNA (rRNA) molecules form the core of a cell's ribosomes (the structures in which protein synthesis takes place); transfer RNA (tRNA) molecules carry amino acids to the ribosomes during protein development.
- the end product is RNA.
Explanation:
I hope this helps! (pls mark brainliest) :)
Which is a benefit of binomial nomenclature?
1.Fewer common names
2.Increased understanding and communication
3.Reduced plant-related poisoning
4.Better understanding of genetics of plants
scientists who believe global warming is happening would agree with which of the following statements?
(A) There are few, if any, misconceptions about global warming
(B) Most scientists agree that global warming is occuring
(C) Human activity is a minor cause of global warming.
(D) There is little humans can do to stop global warming
Answer:
B. Most scientists agree that global warming is occurring.
Explanation:
There is a large deal of misconception in the public surrounding global warming. Human activity is the primary cause of global warming, and therefore, there are many actions that humans could take to stop global warming.
Which chemical bond is most common in living things? a. ionic bond b. metallic bond C. covalent bond d. hydrogen bond
Answer:
hydrogen bond
Explanation:
i think because humans have water in the body that has hydroden maybe
¿Cuál se considera la “barrera simbólica” del nivel de CO2 en la atmosfera? ¿Cuál es el nivel de CO2 en la actualidad? ¿Qué significa esto? Menciona tres consecuencias de esta situación.
Answer:
413,55 ppm
Explicación:
413,55 ppm es el nivel de dióxido de carbono actual en comparación con el nivel de dióxido de carbono que es de aproximadamente 280 ppm antes de la revolución industrial. Esto significa que la revolución industrial aumenta la concentración de gas dióxido de carbono en la atmósfera, que es la principal causa del derretimiento de los glaciares, el cambio climático y el calentamiento global. Hay una gran cantidad de dióxido de carbono que se libera de las industrias, lo que es responsable del aumento de la concentración de dióxido de carbono en la atmósfera.
How do feedback mechanisms help maintain homeostasis?
it involves negative feedback loop
Explanation:
the loop allows living organisms to maintain homeostasis
Davahl is interested in tortoises because they can live for over a hundred years and have unique metabolisms. She wants to perform an experiment to see if they can live even longer with a specific nutrient supplement Davahl is given a five-year research grant to perform her experiment
Which is the most likely practical limitation that Davahl is having with performing her experiment?
O time
O ethics
O money
O technology
Answer:
Time
Explanation:
As said In The Question "They Can Live Over A Hundred Years", Well There Is No Way That Davahl Can Live For Over A Hundred Years
