The statements which describe the processes involved in the accretion of planetesimals and protoplanets are:
II. Both involve the formation of solid particles from nebular materials.
IV. Both involve the trapping of gases and the clumping of masses of matter.
Accretion can be defined as the accumulation of coastal sediment, sand or land mass on a tectonic plate at a subduction zone over time.
Planetesimals refers to the small celestial bodies of a combination of dust, rock and gas which combines to form the planets, after the solar system begin to form.
Protoplanets can be defined as a large collection of matter within a giant cloud of gas and dust in orbit around the sun and developing into a planet. Thus, a protoplanet is a large planetary embryo in its early stages of evolution through accretion.
Basically, the processes involved in the accretion of planetesimals and protoplanets are;
The formation of solid particles from nebular materials.The trapping of dusts, gases and the clumping of masses of matter such as rocks.Read more: https://brainly.com/question/10337469
In fluorescence microscopy, the _____ absorbs light energy from the excitation light and emits colored light.
Answer:
fluorochrome absorbs light energy
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Which of the following is NOT a function of a lipid?
Cell membrane formation
Long term energy storage
Quick source of energy
Hormones (steroids)
Give an example of solute, solution, and solvent.
Answer: Saline = Solution, Salt = Solute and Water = Solvent.
I hope that this helps you !
In a population of seahorses, red seahorses on average produce 125 offspring and brown seahorses produce 75 offspring. What is the fitness of the brown phenotype?
"The first step of an action potential involves a large concentration of _____ passing through the cell membrane."
Answer: Sodium
Explanation:
An action potential is a wave of electrical discharge that travels along the cell membrane modifying its electrical charge distribution. Action potentials are used in the body to carry information between tissues, making them an essential feature for life.
They can be generated by various types of body cells, but the most active in their use are the cells of the nervous system to send messages between nerve cells (synapses) or from nerve cells to other body tissues, such as muscle or glands. There is always a potential difference or membrane potential between the inner and outer part of the cell membrane (usually ~70 mV). The charge of an active cell membrane remains negative (inside vs. outside) and varies within narrow images.
The difference in membrane potential is due to the differential distribution of ions (mostly chlorine and sodium on the outside of the cell, and potassium and organic anions on the inside). The cause of the action potential is the exchange of ions across the cell membrane. First, a stimulus opens the sodium channels. Since there are some sodium ions on the outside, and the inside of the neuron is negative relative to the outside, the sodium ions quickly enter the neuron. Sodium is positively charged, so the neuron becomes more positive and begins to depolarize. Potassium channels take a little longer to open; once opened, potassium quickly leaves the cell, reversing the depolarization. At about this time, the sodium channels begin to close, bringing the action potential back to -70 mV (repolarization).
What was the first animal to orbit the earth?
NEED HELP ASAP
what is the main purpose for a plant to move water from the ground into the leaves
Answer:
The main purpose is for photosynthesis so that it can make food.
Answer:
For the process Photosynthesis.
Explanation:
Leaves need water to produce Chlorophyll and Chlorophyll will be produced by the process known as Photosynthesis.
A teacher cut an apple into three wedges of the same size.
She dipped one wedge in lemon juice, dipped another in
water, and left one alone. Then she left the wedges on a
paper towel on her desk. After 1 hour, only the wedge that
had been dipped in lemon juice was still yellow. The other
two wedges had turned brown.
What is the responding variable in this experiment?
I am not entirely sure what you mean by "responding variable" but I'm going to guess it was the vinegar since it has been used as a perservative for years.
Hope that helps in some way.
Renewable energy
Non renewable energy
Pros:
Cons:
Answer:
Renewable Energy
Pros: Cleaner than fossil fuel, an abundance out there, can be used without interruption
Cons: Takes alot of energy to produce, may be seasonal and competes with food production
Explanation:
Earth scientists study the history of the earth. What are some ways that they determine the age of the earth or geologic features (for example, what did William Smith do?)? Which techniques are most accurate to help with this process? How has our understanding of the age of the earth changed over time
Answer:
To establish the age of a rock or a fossil, researchers use some type of clock to determine the date it was formed. Geologists commonly use radiometric dating methods, based on the natural radioactive decay of certain elements such as potassium and carbon, as reliable clocks to date ancient events.
Explanation:
WILL GIVE BRAINLIEST!! Please just take time to look! Thank you:) Under the right circumstances, the lysogenic cycle changes to the lytic cycle. Explain whether the lytic cycle can change to the lysogenic cycle.
Answer:
I don't think that lytic cycle can change to the lysogenic cycle.
Environmental stressors such as starvation or exposure to toxic chemicals may cause the prophage to excise lysogenic cycle and enter the lytic cycle.
Hope it helps.
someone took the last cookie jar last night the last person to leave the scene is the culprit. Who was it?
clues:
the butler walks to work
the handyman rides a bike
the cook rides a motorcycle
the maid drives a car
the nephew has a seeing-eye dog
Answer: nephew, it didnt say that he left the place yet
What cell is it going to be?
Answer:b, d
Explanation:
:)
Question 7 (1 point)
Critique the following hypothesis. The width of a rainbow is proportional to the number of raindrops that fall in a storm.
Answer:
Explanation:
Droplet Size. The colors we see of the rainbow depends on the size of the raindrops. If the drops are large, 1 millimeter or more in diameter, the rainbow will be bright with well defined colors where red, green, and violet are bright but having little blue. As the droplets get smaller, red weaken
Which of the statements regarding enzymes is FALSE? *
Enzymes are proteins that function as catalysts
O Enzymes are specific
O Enzymes provide activation energy for reactions
Enzymes can only be used once
Answer:
Enzymes can only be used once
Explanation:
Enzymes are there forever
Enzymes are the bio-catalysts that play a crucial role in several chemical reactions and metabolic cycles of the body.
The statement for the enzyme that is false is:
Option D. Enzymes can only be used once
The role of enzymes are:
1. The enzymes are the protein molecules, which are made up of long chains of amino acid residues.
2. Enzymes are highly specific because they have different shaped active sites for the binding of respective substrates.
3. Enzymes are the important parts of reactions and are the bio-catalysts. They lower the activation energy for the reactions and fasten the rate of reaction.
4. The enzymes are referred to as catalysts, and thus they are not utilized in the reaction, thus, they can be reused again.
Thus, Option D is false for enzymes.
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Kilogram is the SI base unit for measuring
A. length
B. mass
C. volume
D. tempature
Answer: The answer is, (B) Mass.
Explanation: Because, The SI unit of mass is the kilogram (kg). In science and technology, the weight of a body in a particular reference frame is defined as the force that gives the body an acceleration equal to the local acceleration of free fall in that reference frame.
In a person with a low platelet level, which process is slower than normal?
A antibody formation
B blood clotting
C oxygen carriage
D phagocytosis
Answer:
In a person with a low platelet level slower the blood clotting than normal
Explanation:
Lower platelets lever is called thrombocytopenia.
Platelets function is to clot the blood when it becomes low then there is no blood clotting.
A person with a low platelet level has a lower rate of blood clotting than the normal rate that is present in Option B. Platelets play a major role in blood clotting and stop blood loss.
What are the different functions of the blood?The blood has different types of cells, such as the red blood cells that take part in oxygen transport, nutrition transport, etc., and the white blood cells that take part in the protection of the body against foreign pathogens. There are different types of white blood cells, such as eosinophils, basophils, and lymphocytes, and these cells have different properties, such as the ability to detect some viruses, parasites, bacteria etc. Platelets are the cell fragments that take part in blood clotting along with other proteins.
Hence, a person with a low platelet level has a lower rate of blood clotting than the normal rate that is present in Option B.
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which of the following are effects of environmental change on an entire species? A. individual deaths and impacts on growth and development B. impacts on growth and development and losses of habitats C. species competition and individual deaths D. extinction and change in species competition
Answer:
It is D extincitionn and change in species competition
Explanation:
The following effects of environmental change on an entire species are the extinction and change in species competition.
How do environmental changes affect a species?A significant change in the environment prefers some features of flora , faunna and microbes over others.
These features contrasts each other oftenly genetically based so that prefered features may rise in the next generation.
The more concise the generation time, the more instanteaneous this evolutionary shift can occur.
Thus, option "D" is correct, extinction and change in species competition will effect the environment.
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An experiment was conducted to determine which type of fruit attracts the most fruit flies. Equal sized pieces of apple, pear, and banana were placed in separate containers at different areas around the school. The containers allowed the fruit flies to enter, but the fruit flies were unable to escape. After one day, observations were made by the students. Which best describes an error the students made in the experiment? A) too many types of fruit were used B) fruit flies were unable to escape C) different areas around the school were used D) one day is not long enough for the experiment
Answer:
C
Explanation:
The error that the student made was to place the containers for the different fruits in different areas around the school.
In order to ensure that each contain receives the same treatment, they should have been placed in the same area around the school. Different areas around the school might have varied populations of fruit flies, hence, jeopardizing the result.
The containers should have been subjected to the same conditions in order to ensure an unbiased outcome.
The correct option is C.
An organism has 3 duplicated chromosomes after the Sphase of the Cell Cycle. How many total sister chromatids does it have?
An organism has 3 duplicated chromosomes after the S phase of the Cell Cycle, the total sister chromatids have - 6 chromatids.
S-phaseThe number of Chromatids doubles in the Synthesis phase, but the number of chromosomes stays the same. Anaphase doubles the chromosome number but does not affect the chromatid number
The chromosome is different at different times in the cell cycle, depending upon whether the DNA has replicated or not, and when the sister chromatids separate
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Difference between sensory and motor neurons ???
Answer: Sensory neurons are neurons responsible for converting external stimuli from the environment into corresponding internal stimuli. Motor neurons are neurons located in the central nervous system (CNS); they project their axons outside of the CNS to directly or indirectly control muscles
Answer:
Sensory Neuron
Neurons that carry sensory impulse from sensory organs to the central nervous system are known as sensory neurons They are located in the dorsal root ganglion of the spinal nerveIt is unipolarComprises of a short axonAn adult has an average of 10 million sensory nerves in the bodyFound in eyes, skin, ears, tongue and nosemotor neuron
A neuron that carries motor impulses from the central nervous system to specific effectors is known as motor neurons.They are located in the ventral root ganglion of the spinal cord.It is multipolarComprises of a long axonHalf million of motor neurons are found in the bodyFound in muscles and glandsEarth's layers formed because of differences in ______ of the materials.
Answer:
densities
Explanation:
Earth's layers formed because of differences in densities of the materials.
This means, less dense lighter object will be near the top, and the more dense, thicker and heavier stuff is in the core.
Earth's layers formed because of differences in densities of the materials.
What are Earth's Layer?Earth is made up of four distinct layers, from deepest to shallowest, the inner core, outer core, mantle, and crust. All these layers are formed because of the differences in the densities of the materials.
1. The inner core:
The inner core is composed mostly of iron and nickel. The inner core rotates slightly faster than the rest of the planet, which is also much hotter.
2. The outer core
The outer core is made from iron and nickel which is present in liquid form
3. The mantle
The mantle is made up of of iron, magnesium and silicon which is dense, hot and semi-solid.
4. The Crust
The crust is extremely thin, cold and brittle which is compared to what lies below it that is made of relatively light elements
Thus, Earth's layers formed because of differences in densities of the materials.
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A car drives with a constant speed of 28 miles per hour. How far can it travel in 2 3/4 hours?
Answer:
77 miles.
Explanation:
28 miles per hour.
to break it up.
1 mile = 28
1 mile = 28
that is a total of 56 miles in 2 hours.
3/4 of 28 is 21.
21 + 56 = 77
Match the characteristics to the correct phylum. organisms lack symmetry organisms have specialized stinging cells adult forms are sessile two types of body plans exist—polyp and medusa organisms obtain food by
Answer:
The organisms phylum is cnidaria of kingdom animalia.
Explanation:
Phylum cnidaria are Majorly aquatic organisms that live mostly in Marine habitats.
They are radially symmetrical.
They are multicellular organisms and have few tissues.
They have internal body cavity and mouth.
They have specialised stinging cells called cnidocytes which has nermatocysts.
They reproduce either sexually or asexually.
The adult exist in two different forms , Polyp and Medusa.
They are canivorous or filter feeders.
Examples are corals, hydras, jelly fishes, sea anemones e.t.c.
A removal of a dam in a river has restored river flow and improvedthe water quality of the river. Which of these would most directly increase due to the enhanced water quality in the river ecosystem
Answer:
i dont you figure it out
Explanation:
sorry
Answer:
the life in the ecosystem such as fish turtles green life will all continue grow more efficiently due to the cleaner water
Explanation: the cleaner water helps the fish live a longer and healthier life
such as turtles do need fish and algae for food the green life the cleaner water helps them grow witch the fish and turtles can snack on hope that helped
How do RNA's subcomponents affect its properties? (3 points) A. Adenine and cytosine bond with thymine and guanine, respectively, causing RNA to fold into functional units. B. Base pairing occurs within an RNA molecule to give RNA the three-dimensional shape needed for specific functions. C. Deoxyribose and phosphate interact to provide RNA with a backbone to which nucleotides become bound. D. The nitrogenous bases in RNA molecules undergo dehydration reactions to form large biological polymers.
Answer:
B. Base pairing occurs within an RNA molecule to give RNA the three-dimensional shape needed for specific functions.
Explanation:
Ribonucleic acid, known as RNA, is a type of nucleic acid found in living systems. In opposition to the other type of nucleic acid (DNA), RNA is a short single stranded molecule. Both DNA and RNA are made of nucleotides, composed of a phosphate group, nitrogenous bases and a pentose sugar.
The presence of ribose sugar and Uracil base in RNA instead of deoxyribose sugar and thymine base respectively structurally differentiates the molecule from DNA. However, base pairing occurs within the RNA molecule to form the three-dimensional shape of the RNA, which is key to the specificity of its function.
__________ are fairly small organelles that provide a safe place within the cell to carry out certain biochemical reactions that generate harmful, highly reactive oxygen species. These chemicals are both generated and broken down in the same location.a) Lysosomesb) Endosomesc) Peroxisomesd) Nucleosomes
PLEASE HELP ME!!! 30 points (also marked Brainlest)
Answer:
Explanation:
2-They live in burrows that they dig into the soil. This helps
aerate the soil and improve plant growth.
Crab feeding and burrowing mixes nutrients into the soil,
which is also good for plants. (important)
Fiddler crabs also promote marsh
plant growth that is important for the protection of coastal
cities from hurricanes.
A tree or plant can live without its bark or epidermis. TRUE OR FALSE
Answer:
false
Explanation:
explain how migration, selection, and adaptation might account for various groups of animals coming into existence after the flood
Answer:
As the kinds of animals on Noah's ark were dispersed, the great variability designed into their gene pool allowed them to interact with the environment. The evidence shows that the emergence of new varieties and species can occur in some organisms in as little as five to ten generations an observed fact that evolutionists cannot explain.