Answer:
Examples of r-selected species include pest organisms, such as rodents, insects, and weeds.
Explanation:
Most of the insects are the R-selected species. Hence, the correct option is A.
What are R-selected species?These are the organisms having reproductive strategy that is characterized by high reproductive rate, short life span and numerous offspring with a low level of parental investment.
They are often found in environments that are unpredictable and change rapidly, and they are well adapted to these conditions because of their ability to produce numerous offsprings.
The large number of offspring increases the chances of survival for at least some offspring, even if the environment changes or if only a few survive. Examples-Certain insects, rodents, and some plants. Hence, the correct option is A.
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Which of the following correctly compares run-of-the-river dams and storage dams?
Select one:
of
оа.
Run of the river dams are less damaging to the environment.
O b. Storage dams can serve several purposes in addition to creating electricity.
O c. Storage dams are better built.
d. Run of the river dams are more efficient.
Dus page
Finish attempt
Answer:the answer is b
Explanation:
The answer is b because run of river cannot serve a lot of purposes like the storage dam and the dam is like most sturdier than the run of river.
When it comes to run-of-the-river-dams and storage dams, а. Run of the river dams are less damaging to the environment.
What is a run-of-the-river dam?This is a type of dam that allows for the natural flow of water to continue without attempting to store the water.
As a result, it is not as damaging to the environment unlike storage dams which store water and disrupt flow and migration patterns.
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B. What structures are missing from the root hair cells?
Answer:
The function of root hairs is to collect water and mineral nutrients that are present in the soil and take this solution up through the roots to the rest of the plant. As root hair cells do not carry out photosynthesis, they do not contain chloroplasts.
Explanation:
Mitochondria are missing from root hair cells.
Root hair cells are specialized plant cells found in the roots of plants. Their primary function is to absorb water and minerals from the soil. To achieve efficient absorption, root hair cells have evolved specific structural adaptations.
Root hair cells are elongated and have a large surface area due to their elongated projections called root hairs. This increased surface area enhances their ability to come into contact with the soil, maximizing water and nutrient absorption. However, due to their focus on absorption and their short lifespan, root hair cells exhibit some structural simplifications, such as the absence of certain organelles.
One notable organelle missing from root hair cells is the mitochondria. Mitochondria are the "powerhouses" of cells, responsible for generating energy in the form of ATP through cellular respiration. Since root hair cells are mainly involved in absorption rather than energy production, they have a reduced need for extensive energy generation. As a result, they don't require as many mitochondria as other cells that are highly metabolically active.
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HELP ASAP!!!!
The diagram below shows a cell placed in a solution.
A cell is shown placed inside a beaker. It is labeled Cell. The solution inside the beaker is labeled 2 percent salt solution and the solution inside the cell is labeled 4 percent salt solution.
What will most likely happen to the cell?
It will expand as water moves out of it.
It will shrink as water moves out of it.
It will expand as water moves into it.
It will shrink as water moves into it.
Answer:
It will expand as water moves into it.
Explanation:
Answer:
D.It shrink as water moves into it
Explanation:
I HOPE THIS HELPS!!!!
Which is an example of active transport?
capturing sunlight to split water molecules in photosynthesis
capturing sunlight to split water molecules in photosynthesis
unwinding a strand of DNA prior to replication
unwinding a strand of DNA prior to replication
absorbing water through the cell membrane of a cell
absorbing water through the cell membrane of a cell
using energy to move waste materials out of a cell
Active transport is a type of transport that requires energy to move substances across a membrane. It occurs against a concentration gradient.
The use of energy to move waste materials out of a cell is an EXAMPLE of transport active.Active transport occurs against a concentration gradient, whereas passive transport (i.e., diffusion) occurs in favor of a concentration gradient.Active transport can be mediated by membrane proteins that move substances from an area of high concentration to an area of low concentration.This movement (active transport ) usually requires the energy provided by the hydrolysis of ATP.Water molecules move across cellular membranes through membrane protein channels called aquaporins that act in favor of a concentration gradient (passive transport).
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If Malaria is contracted, where within the body does it reproduce before attacking the red blood cells
Answer:
the liver
Explanation:
With some species of malaria, such as Plasmodium vivax and Plasmodium ovale, the parasite can lie dormant in the liver. It can therefore take up to a year for symptoms to develop (see life cycle above). Once inside the body, the malaria parasites grow and multiply inside the red blood cells.
Hope this helps!!! If so please mark brainliest <3
Answer:
Liver
Explanation:
Sickle-cell anemia is a genetic blood disorder. Red blood cells normally have a round shape and pass easily through small blood vessels as they deliver oxygen to the tissue. But in people with sickle-cell anemia, some red blood cells are shaped like a sickle, or a "C." The red blood cells with this sickle shape do not live as long as healthy, round blood cells.
The sickling of red blood cells is thought to be due to problems with the hemoglobin gene. The unusual behavior of the hemoglobin causes rigid fibers of protein to form in the cell membrane, leading to a decrease in its flexibility and the change in cell shape. These rigid, deformed cells are more likely to rupture or get stuck in small blood vessels, creating a blockage. When blood flow to tissues is interrupted, this can lead to long-term damage to organs and even cause death.
1. a) Based on the information above, what are at least two changes that take place in the red blood cells of individuals with sickle-cell anemia? (2 points)
it delivered oxygen easily
in sickle it cause problem
Explanation:
it because their blood cell is not spherical
Effects of temperature on brooding of chicks
Answer:
In research studies where groups of chicks were brooded at either 80 degrees F or 90 degrees F, the chicks reared under the warmer temperature had better weight gains, feed conversion and livability. Chicks brooded under 80 degrees F experienced reduced growth compared to the high brooding temperature treatment.
Explanation:
_____ splits water into 1/2 O2, H , and e- . A structure of a thylakoid. Letters from A to E indicate definite structures. Letter A indicates the first protein complex located in the thylakoid membrane. Letter B indicates a multiprotein complex between two complexes A and C. Letter C marks the second integral membrane protein complex. Letter D marks a substance inside the thylakoid. Letter E indicates a flask-shaped structure in the membrane of the thylakoid, which has a canal through the membrane. D B C A E
The luminous reactions begin when light reaches photosystem II. The water molecules provide electrons to the photosystem, releasing oxygen and protons. The letter A represents photosystem II that splits water.
-----------
1. Luminous energy is trapped by chlorophyll in Photosystem II.
2. When the pigment molecules absorb light, electrons provided by water molecules get in a higher energy level.
3. The excited electrons go through the electron transport chain from Photosystem II to a less energetic level in photosystem I.
4. When the excited electrons leave photosystem II, they are replaced by new electrons extracted from the water molecules.
5. Luminous energy absorbed move the electrons from the photosystem I to another electron acceptor, from where they get transported again and used to produce NADPH molecules.
6. When electrons leave Photosystem I, they are replaced by new electrons coming from photosystem II.
7. When the water molecule breaks down, hydrogen ions remain in the thylakoid lumen, from where they are pumped to the stroma by the ATP synthase.
8. The released energy is used to produce ATP molecules.
9. Hydrogen ions go back from the stroma to the thylakoid compartment.
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Use the graph below to determine the range of values in which the LD50 of this pollutant lies. Dose-response curve shows twenty percent of the population died when exposed to thirty-eight milligrams of pollutant A per kilogram of water. Forty percent of the population died when exposed to forty-two milligrams of pollutant A per kilogram of water. Sixty percent of the population died when exposed to fifty-five milligrams of pollutant A per kilogram of water. Eighty percent of the population died when exposed to sixty milligrams of pollutant A per kilogram of water. One hundred percent of the population died when exposed to one hundred milligrams of pollutant A per kilogram of water.
Between 0 and 20 mg/kg
Between 20 and 40 mg/kg
Between 40 and 60 mg/kg
Between 60 and 80 mg/kg
Answer:
The answer is C, Between 40 and 60 mg/kg
Explanation:
I just took the test and it was right :)
What would be the strand of dna replicated from ATCGGATTTACCG
Answer:
The new DNA strand will have the bases GATCCA.
Explanation:
Adenine (A) always pairs up with thymine (T), and guanine (G) will always pair up with cytosine (C).
(Adenine and Thymine have only two places to form hydrogen bonds, whereas Guanine and Cytosine have three places. )
hope this helps in some way
Which of the following is an accurate description of a positive feedback loop? SC.912.E.7.7
A.
It is uncommon in nature and it makes systems stable.
B.
It is common in nature and it doesn’t change the stability of systems
C.
It is uncommon in nature and is usually caused by humans
D.
It is common in nature and it makes systems stable
Regulatory functions such as feedback loops are very common in nature and happen thousands of times every day within our bodies alone.
A feedback loop is one of the methods by which biological organisms regulate functions. Feedback loops are a self-regulatory means through which the output of a system is then used as the input. Feedback loops can be of two types:
Positive FeedbackNegative FeedbackA positive feedback loop is one in which the system is stimulated to increase the production of a product. For example, the low levels of an enzyme in the blood will cause the body to produce more of that enzyme in a positive feedback loop. A negative feedback loop is just the opposite, in which high levels will cause a decrease in production.
Feedback loops are a vital part of maintaining homeostasis and for the survival of all organisms. Therefore, we can conclude that option D is correct in stating that feedback loops are common in nature and make the system stable.
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what part of the skin contains blood vessels that help regulate body temperature
Answer: Dermis
Explanation: The blood vessels of the dermis provide nutrients to the skin and help regulate body temperature.
hurryyy , ill mark brainlist!
Known as the 'Pine Tree State; Maine's state tree is the Eastern white pine. Consider the model. Cärbon dioxide, water, and sunlight
are reactants of photosynthesis and are used to produce glucose and release water as a byproduct. What advantage does the pine tree
have in performing photosynthesis compared to deciduous trees such as oak or maple?
34)
A) Pine trees need less water to do photosynthesis.
B) Pine trees produce twice as much glucose as deciduous trees.
C) Pine trees do not lose their leaves and can photosynthesize all year.
D) Pine trees get more sunlight than oak trees due to their darker color.
Answer:
C) Pine trees do not lose their leaves and can photosynthesize all year.
Explanation:
In cold-temperate and Arctic regions, however, evergreens are typically cone-bearing shrubs or trees (conifers), such as pines and firs. Many tropical species of broad-leaved blooming plants are evergreen. Thus, option C is correct.
What are features of pine trees?Pine trees may photosynthesize in the winter because they retain their needles all year long! Compared to trees that lose their leaves, this is a significant advantage.
Their leaves therefore stay green and stay attached for a longer period of time than their deciduous counterparts because they can preserve more water.
However, because of their tiny surface area, needles are not as effective at absorbing the sun's energy.
Therefore, Pine trees do not lose their leaves and can photosynthesize all year.
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which animal was the first to be domesticated by early humans?
Answer:
it is dog because the dog is the best friend of the human
Answer:
Goats
Explanation:
Goats and/or sheep were the first animals to be domesticated by early humans.
Summarize the role
of organisms, including micro-
organisms, in maintaining the
equilibrium of a marine ecosys-
tem while a dead whale decays
on the ocean floor.
Answer:
The disturbance that causes the succession begins with a large whale dying and sinking to the bottom of the ocean floor. The whale carcass attracts scavengers and decomposers who eat the decaying meat.
Then, within a year, most of the whale's tissues have been eaten. The remainder of the carcass is then eaten by a much smaller number of fish. The decomposition of the whale's body will enrich the surrounding sediments with nutrients.
When only the skeleton is left, a third community moves in. Heterotrophic bacteria will begin to decompose the oils found inside whale bones. During this process, they will release chemical compounds that serve as energy sources for other bacteria. This chemosynthetic bacteria will also support a wide variety of nearby organisms living on the bones.
The decay of a dead whale on the ocean floor provides food and energy for a variety of organisms, which helps to maintain the equilibrium of the marine ecosystem.
When a whale dies, it sinks to the ocean floor and begins to decay. The decay process releases nutrients into the water, which attracts a variety of organisms, including bacteria, fungi, and worms. These organisms feed on the whale's carcass, breaking it down into smaller and smaller pieces.
As the whale decomposes, it releases carbon dioxide and other nutrients into the water. These nutrients are then used by other organisms in the ecosystem, such as algae and phytoplankton. The algae and phytoplankton use the nutrients to photosynthesize, which produces oxygen. The oxygen is then released into the water, which helps to support other life in the ecosystem.
The decay of a dead whale also provides a habitat for a variety of organisms. The whale's carcass creates a sheltered environment for small organisms, such as crabs and shrimp. These organisms provide food for larger organisms, such as fish and seabirds.
The decay of a dead whale is an important part of the marine ecosystem. It provides food and energy for a variety of organisms, which helps to maintain the equilibrium of the ecosystem. The decay process also releases nutrients into the water, which are then used by other organisms in the ecosystem.
Here are some additional details about the role of organisms in the decay of a dead whale:
Bacteria: Bacteria are the first organisms to colonize a dead whale. They break down the whale's carcass into smaller and smaller pieces.Fungi: Fungi also play a role in the decay of a dead whale. They break down the whale's carcass into even smaller pieces, releasing nutrients into the water.Worms: Worms are another important group of organisms that help to decompose a dead whale. They burrow into the whale's carcass, breaking it down into even smaller pieces.Algae: Algae and phytoplankton use the nutrients released by the decay of a dead whale to photosynthesize. This produces oxygen, which helps to support other life in the ecosystem.Fish: Fish are attracted to the carcass of a dead whale. They feed on the whale's flesh and bones, as well as on the smaller organisms that live on the carcass.Seabirds: Seabirds also feed on the carcass of a dead whale. They eat the whale's flesh and bones, as well as the smaller organisms that live on the carcass.The decay of a dead whale is a complex process that involves a variety of organisms. These organisms play an important role in maintaining the equilibrium of the marine ecosystem.
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explain the roles of mRNA and tRNA in protein synthesis
Answer:
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); and transfer RNA (tRNA) molecules carry amino acids to the ribosomes during protein synthesis
Answer:
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); and transfer RNA (tRNA) molecules carry amino acids to the ribosomes during protein synthesis
Explanation:
What is the mass of 500 ml of water?
Which statement best explains why carbon is present in so many kinds of molecules?
A. It can form four covalent bonds.
B. It is abundant on earth.
C. It has valence electrons.
D. It can become an ion.
Answer:
A is the ans
Explanation:
hope it helps :p
Answer:
A. It can form four covalent bonds.
Explanation:
in terms of structure, how do channel proteins differ from carrier proteins?
Answer:
Moreover, carrier proteins can carry out both active and passive transportation of solutes, whereas channel proteins bring about passive transport only. Both carrier proteins and channels proteins also differ in their chemical composition - whilst the former are glycoproteins, the latter are lipoproteins.
Explanation:
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Carrier proteins can carry out both active and passive transportation of solutes, whereas channel proteins bring about passive transport only.
What are the functions of carrier proteins?Carrier protein is a type of cell membrane protein involved in facilitated diffusion and active transport of substances out of or into the cell. Carrier proteins are responsible for the diffusion of sugars, amino acids, and nucleosides.
Moreover, carrier proteins bind specific solutes and transfer them across the lipid bilayer by undergoing conformational changes that expose the solute-binding site sequentially on one side of the membrane and then on the other.
Membrane carrier proteins are important transmembrane polypeptide molecules which facilitate the movement of charged and polar molecules and ions across the lipid bilayer structure of the cell membranes.
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red-green colorblindeness occurs more commonly in men than it does in women. using this information, which chromosome do you suppose the gene for red-green colorblindness resides on, and is the trait dominant or recessive?
Answer:
Usually the Y chromosome. It is recessive because if one Y chromosone is mutated with red-green colorblindness and the X is not, the child will have colorblindness. But, if one X chromosome has the mutation and the other X does not, they will cancel out, meaning the child will not have colorblindness.
Answer this please
fastest answer gets brainliest!!
Answer:
CO2 comes from air, gases, and burning.
H2O comes from the air and rain or someone watering the plant
Energy for the plant to grow
Explanation:
need help can somebody help me please and thank you
Answer:
ok think of apples and trees and car and garage
Explanation:
the A goes to the T because it represents apples to trees and then C goes to the G because its car to the garage it that's how i've always remembered that for MRNA
when the net filtration pressure is negative, what process is occurring?
what are the two main cells found in the epidermis
why is sustainable use of natural resources important? to ensure that natural resources are available for future generations to help make daily life simpler by providing what every person needs to encourage scientists to make new and elaborate discoveries to prevent the exchange of resources from one region to another
Answer:
The correct answer is (a) to ensure that natural resources are available for future generations.
Sustainable development means optimized use of natural resources to meet the demand of people in the present and future scenario. The main aim of sustainable development is to balance our economic, environmental and social needs which allows the prosperity for now and future generations. Sustainability can only be maintained when the resources are used in a way that it meets the need of people, not the greed of people.This is done to ensure that natural resources are available for future generations.
Explanation:
Hope this helps...
The sustainable use is important as it ensure that the natural resources are available for future generations. So, the correct option is A.
What is Sustainable development?Sustainable development is defined as an organizational principle which aims to meet the human development goals while also enabling natural systems to provide essential natural resources and ecosystem services to humans.
The main objective of sustainable development is to balance our economic, environmental and social needs in a way which allows prosperity for present and future generations. The sustainable use is important as it ensure that the natural resources are available for future generations.
Therefore, the correct option is A.
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Your question is incomplete, most probably the complete question is:
Why is sustainable use important?
to ensure that natural resources are available for future generationsto help make daily life simpler by providing what every person needsto encourage scientists to make new and elaborate discoveriesto prevent the exchange of resources from one region to anotherto stimulate muscle contraction acetylcholine is released from the
Answer:
motor neuron
Explanation:
identify the four main components of all eukaryotic membranes.
Answer:
nucleus, golgi complex, cell membrane, and mitochondria
Explanation:
Answer:
nucleus, golgi complex, cell membrane, and mitochondria
Explanation:
just better
"Blending" genes is associated with:
O Complete Dominance
O Blood Typing
O Incomplete Dominance
O Codominance
Answer:
a
Explanation:
The "blending" of genes is associated with incomplete dominance.
Incomplete dominance occurs when neither of the two alleles in a gene pair is completely dominant over the other.
Instead, the phenotype of the heterozygous individual is an intermediate blend or mixture of the phenotypes associated with each allele. In other words, the traits from both alleles are expressed in a blended or intermediate manner.
For example, in a cross between a red-flowered plant (RR) and a white-flowered plant (WW), if incomplete dominance is present, the resulting offspring (RW) may have pink-colored flowers, which represent a blend of the red and white traits.
Thus, the answer is incomplete dominance.
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Pls help pictures provided
Answer:
D. Matter is constantly cycling thought the environment
Explanation:
if im wrong im soo sorry
i hope it helps
the ________ response cycle includes four phases including excitement, plateau, orgasm, and resolution.
Starts with an S ends with an L.
Rhymes with usual (Big Brain thinking)