Can a generalist species be a keystone species?
Answer:
Yes
Explanation:
Any organism, from plants to fungi, maybe a keystone species; they are not always the largest or most abundant species in an ecosystem. However, almost all examples of keystone species are animals that have a huge influence on food webs
Permits in the cap and dividend policy are issued for _______ production. a. carbon dioxide b. timber c. water pollution d. plastic
Answer:
the answer is A.. I think
Permits in the cap and dividend policy are issued for carbon dioxide production. Therefore, option (A) is correct.
What is The cap and dividend policy?The cap and dividend policy is one potential approach to lowering carbon emissions and slowing the progression of climate change. The way it works is by first establishing a limit on the total amount of carbon emissions that are permissible within a given time period, and then handing out permits to businesses in proportion to the amount of emissions that they are responsible for producing.
If a company emits fewer greenhouse gases than their allotted amount, they have the option of selling their unused permits to businesses that have a demand for more. This results in the creation of a revenue stream that can be distributed to individuals in the form of a dividend, as well as a financial incentive for businesses to reduce the amount of carbon emissions they produce.
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Oxygenic photosynthesis at first caused a mass extinction, but also allowed complex life on Earth to develop. In what ways does free oxygen allow complex life
Answer:
Oxygen would be played a key role in evolution of complex organisms because this molecule is required to efficiently produce chemical energy during cellular respiration
Explanation:
Chloroplasts originated from endosymbiotic cyanobacteria 1,500 million years (mya) ago. Like chloroplasts, mitochondria originated from cyanobacteria, and also approximately at the same time. Mitochondria are organelles capable of generating energy by burning oxygen during cellular respiration (aerobic respiration). During this period (1,500 mya), complex cells became able to efficiently produce energy by using oxygen in aerobic reactions, which can be attributed to the emergence of mitochondria. Interestingly, it has been shown that during the next 500 mya, different groups of organisms composed of more than 50 different cell types evolved (including algae, fungi and early animals). Therefore, it is possible to hypothesize oxygen would be a critical molecule without which complex organisms couldn't evolve.
Oxygen played a vital role in evolution of complex life because the transfer of electrons from organic molecules to oxygen released a large amount of energy, thus resulting in efficient production of chemical energy during cellular respiration.
For life to exist, energy must be available and abundantly so, in order to carry out the vast array of activities that makes life possible.
At first, only simple life forms which did not depend on oxygen existed. This life forms were collectively known as anaerobes.
Because the electron acceptors they used then were not very efficient in accepting electrons during the oxidation of organic compounds to produce energy, life remained in simple forms as microorganisms.
However, as the atmosphere became progressively richer in oxygen, some anaerobic microorganisms evolved who were able to obtain energy by passing electrons to oxygen.
Endosymbiotic associations which eventually became permanent between aerobic and anaerobic microorganisms gave rise to structures such as the mitochondria, plastids and chloroplasts.
This ability to effectively use oxygen as electron acceptors to produce energy as in mitochondria as well as produce oxygen as in chloroplasts led to the appearance of more complex life forms who were able to carry out more complex life activities due to efficient production and utilization of energy. These life forms include the algae, fungi and early multicellular animals.
Therefore, it can be concluded that oxygen played a vital role in evolution of complex life because the transfer of electrons from organic molecules to oxygen released a large amount of energy, thus resulting in efficient production of chemical energy during cellular respiration.
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Plz help I’ll mark brainliest
Answer:
C. The study of the interaction between living and nonliving factors in an environment
Explanation:
Ecology is the study of both living and nonliving things in an environment, the only answer that relates to this in significance is C.
Homeostasis: Response to Stimuli
From the examples below, select the examples of cells or organisms responding to stimuli in order to maintain homeostasis.
1.)A plant bending toward a light source
2.)A cell bursting because it takes up too much water
3.)A person shivering when their body temperature is low
4.)A unicellular organism beating microscopic hairs to escape a chemical pollutant in its environment
5.)A cell dying due to a chemical poison
6.)An animal growing larger
7.)Ants moving within their mounds depending upon the time of day
8.)Iguanas laying in the sunlight if their body temperature is low
9.)Birds migrating when seasons change
10.)A person or animal getting sick because of infectious bacteria
part2 fill in the blank
A state of biological balance, or ____________ , is important for the survival of individual cells and ____________ alike.
Physiological factors such as ____________ , water levels, and pH must remain within a certain ____________ for cells and organisms to remain healthy and functional.
Regulation of the ____________ environment of cells and organisms is carried out through ____________ and other control ____________ .
choice of words:
location
external
hormones
mechanism
homeostasis
internal
groups
feedback
oganisms
temperature
range
Answer:
3.)A person shivering when their body temperature is low.
7.)Ants moving within their mounds depending upon the time of day
1-A plant bending toward a light source.
.-Iguanas laying in the sunlight if their body temperature is low.
.-A unicellular organism beating microscopic hairs to escape a chemical pollutant in its environment
.-Birds migrating when seasons change.
The maintenance of relatively constant internal environment of an organism is called Homeostasis.It is an automatic regulations of the body systems and organs controlled by the brain and some receptors, specific for certain body fluctuations.E.g Thermoreceptors Chemoreceptors etc.
The fluctuations in the body internal systems must be controlled within a narrow limits, for existence of living organism.The brain receives inputs from the receptors, and the outputs from the brain ensures the homeostatic control.
The above examples are typical homeostatic responses by the organisms involved, because the inputs from the receptors send signals to the brain ,and the organisms responded to these with the example above.
Explanation:
Does epinephrine trigger a direct or indirect signal transduction pathway? How do you know?
Epinephrine triggers a direct signal transduction pathway.
I know this because when epinephrine binds to it's receptor example on a muscle cell,this is known as a type of G protein -coupled receptor,signal transduction cascade is triggered and this involves the production of a second messenger molecule cyclic AMP(cAMP).
Epinephrine also know as Adrenaline or sus-phrine.
It is a vasoconstrictor,broncho dilator and a sympathetic stimulant.
It constricts the peripheral abdominal organs as well as a stimulating the heart beat thereby raising the blood pressure,it also relaxes the spasms of the bronchial muscles thereby promoting ventilation of the lungs.
What time is it is the United States, more specifically, Fort Knox, Kentucky?????
Answer:
6:52 PM as of right now
Explanation:
Fort Knox Kentucky uses eastern standard time, or (GMT-4) time.
Answer:
It's 6:52 my guy...Brainliest???
Explanation:
How does the control group setup in an experimental differ from the other setups in the same experiment?
Answer:
A control group setup in an experiment is used to see if there are other variables in play during the experiment. Say I was to test which type of blood is a shark's favorite, my control would be putting red paint in one of the set ups to see if the shark is just interested in the red color of blood, instead of the other types of blood.
Explanation:
Answer:
The control group does not receive the independent variable during the experiment.
Explanation:
The group that will receive the independent variable during the experiment is the experimental group. The dependent variable is what you will measure as a result. The control group is not receiving the independent variable during the group, as it is what you're measuring the experimental group to.
Which are the two most important factors determining the movement of ions across the cell membrane?
Answer:
The two most important factors determining the movement of ions across the cell membrane are: the permeability of the molecule in the membrane, and the existence of an energy source.
Explanation:
Ions are charged molecules that, no matter their size, cannot pass through the membrane by simple diffusion because of the nature of the lipid bilayer of the membrane.
Ions can move across the cell membrane in two different ways: passive transport and active transport. The disparity between these two relies on the usage of ATP (energy) - passive transport doesn't need ATP while active transport does. This is where the availability of a source of energy is important, because if there isn't, then active transport is impossible.
On the other hand, ions can move through the cell membrane without the use of energy by diffusing through the membrane with the help of specific membrane proteins that form channels for ions to pass through - and this is where permeability matters: if the cell membrane is permeable to a specific ion, it means that it has opened channels for that ion to use; and this ion will move from one fluid to the other (intracellular or extracellular) following its concentration gradient (for example, sodium is poorly concentrated in the inside of the cell, while is highly concentrated on the outside - this means that sodium will go through the membrane to get inside the cell and even the concentrations between the two fluids, but only if the membrane is permeable to sodium!).
A joint can only perform these movements: flexion/extension and abduction/adduction. It is therefore a:_______ joint.
a. biaxial
b. multiaxial
c. uniaxial
Answer:
A. Biaxial Joint
Explanation:
Flexion refers to a motion that reduces the angle between two body parts. An example is the knee.
Extension refers to a movement that increases the angle between two body parts. An example is also the knee.
Abduction refers to movement away from the midline of the body.
Adduction refers to movement toward the midline of the body.
A Biaxial joint is a joint that allows for movement within two planes.
The wrist is a good example of a biaxial joint
Summarize the ABC's of nutrition and give two examples of each component.
A
Vitamin A; Good for healthy vision and eye health (Carrots and Tomato)
B
Biotin; Supportimg the health of the skin and nerves (Eggs and Leafy vegetables)
C
Vitamin; Protection against our immune systems and also a powerful antioxidant (Pineapple and Kiwi)
C
Calcium; Maintains healthy blood pressure (milk and leafy vegetables)
D
Vitamin D; Essential in the regulation of blood pressure and also help in calcium absorption (ideally sunlight; also fatty fish like salmon)
E
Vitamin E; Aids the promotion of wound healing and cellular repair (Nuts and Plant Oils)
F
Folate/Folic Acid; Helps in Red Blood Cell production and also essential for new cell and DNA synthesis (lentils and leafy greens)
G
Genestein; Reduces the symptoms of osteoporosis (Soybeans and legumes)
H
Hesperetin; Essential in the Reduction the risk of heart disease (Citrus fruits and Citrus peels)
I
Iron; For blood clotting and red blood cell production (Eggs and Prunes)
K
Vitamin K; For blood clotting and Strengthening of bones (Leafy greens like Spinach and Kale)
L
Lycopene; Reduces the risk of macular degeneration as in eyesight (mango and yams)
M
Magnesium; Good for regulation of blood pressure and heart rhythm (Nuts and Beans)
N
Niacin; Helps in energy metabolism (Peanut Butter and Meat sources)
O
Omega-3; Inflammation reduction in the body and also hydration of the skin and hair (walnuts and flax seed)
P
Phosphorus; Helps energy metabolism (Salmon and Cottage Cheese)
P
Potassium; Blood pressure regulation and fluid balance in the body (Bananas and green leafy vegetables)
Q
Quercetin; Has Anti-inflammatory properties and effects (Onions and Grapes)
R
Riboflavin; Vital in red blood cell production (Yogurt and Mushrooms)
S
Selenium; An antioxidant support (Seafood and Poultry)
T
Thiamin; Promotion of a healthy operating nervous system (Seeds and Whole Grains)
V
Valine; It is an essential amino acid that helps in protein metabolism (Meat sources and Eggs)
Z
Zinc; Essential for wound healing and cellular repair (Seafood and Poultry)
An aquarium with a glass lid is an example of an isolated system.
true
false
Answer:
The answer is false!
Explanation:
I took the K12 science quiz. I hope this helps! Have a blessed day! :)
The statement "An aquarium with a glass lid is an example of an isolated system" is false as light, air, and heat can transfer through the glass lid.
What is an aquarium?An aquarium is an artificial place that is made for putting fish and other water animals in houses buildings and other places. Aquariums are made up of glass so can we, so we can see the fish's aquarium also have oxygen pumps the water also changed in the aquarium from time to time and. The aquarium is kind of decorative.
Aquariums are made up of glass, and they are open from the top so that fish can get air.
An aquarium is not an isolated system as light year and heat can transfer through the top and fishes are living organisms that need an open system to breathe and live.
Therefore, the statement is false.
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What is the bond created between the negative and positive ends of the water molecules
Answer:
The slight positive charges on the hydrogen atoms in a water molecule attract the slight negative charges on the oxygen atoms of other water molecules. This tiny force of attraction is called a hydrogen bond. This bond is very weak.
Explanation:
please answer my question
All living cells come from pre-existing cells by division
True
False
Answer:
True
Explanation:
The generally accepted parts of modern cell theory include: All known living things are made up of one or more cells. All living cells arise from pre-existing cells by division. The cell is the fundamental unit of structure and function in all living organisms.
Answer:
I would think it would be true?
What is the reaction of acids with blue litmus paper? With red litmus paper?
Answer:
Blue litmus paper turns red under acidic conditions and red litmus paper turns blue under basic or alkaline conditions, with the color change occurring over the pH range 4.5–8.3 at 25 °C (77 °F). Neutral litmus paper is purple. Litmus can also be prepared as an aqueous solution that functions similarly.
Explanation:
You will observe each rabbit population for one year, collecting information throughout the year
about the fate of each radio-collared rabbit. How will you be able to infer the cause of death for
many of the rabbits?
Answer:
because they sex with their mother
What chemical bond is responsible for the existence of the sugar-phosphate backbone of DNA?
covalent bond
hydrogen bond
metallic bond
ionic bond
Answer:
covalent bond
Explanation:
The Covalent bond is responsible for the existence of the sugar-phosphate backbone of DNA. Thus, the correct option is A.
What is DNA?DNA stands for Deoxyribonucleic acid. It may be defined as a molecule that is present in the cells of an organism that carries genetic information responsible for the development and function of an organism.
The existence of the sugar-phosphate backbone of DNA is accomplished with the help of phosphodiester bonds that are classified under covalent bonds.
Therefore, the correct option for this question is A.
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If a plant does need to use a molecule of glucose from its starch reserves it will use what type of reaction to detach the molecules of glucose
A) Hydrolysis
B) Condensation
C)Dehydration synthesis
D)Covalent bonds
Answer:
c it is c
Explanation:
The plant uses the dehydration synthesis reaction to detach a molecule of glucose that it doesn't need. So the correct option is C.
What is the dehydration synthesis reaction?Dehydration synthesis reactions are combination reactions or synthesis reactions. These either happen between the same monomers or between the different monomer units. They always result in the elimination of water molecules.
These are a type of condensation reaction where the water molecules are eliminated and two other molecules are added.
Each step of the dehydration reaction happens with the elimination of water molecules and thus this reaction is called a dehydration reaction. It also results in the formation of a new substance and thus it is called a dehydration synthesis reaction.
Therefore many biochemical reactions occur through this mechanism of dehydration. For example, the formation of peptides from amino acids is an example of a dehydration synthesis reaction. It is the process of the formation of peptide bonds. This happens between two amino acid molecules.
Therefore the correct option is C.
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Which federal agency protects the ecosystem? Bureau of Land Management National Park Service US Forest Service US Fish and Wildlife Service
Answer:
c
Explanation:
Answer:
its b on edge
Explanation:
3. Every species of fig has its own species of fig wasp to pollinate its flowers. Without the fig wasp, there would be no fig seeds. Without the fig, the wasp could lay no eggs. What is the relationship between these two organisms?
Answer:
obligate mutualism
Explanation:
A type of mutualism in which the species involved are in close proximity and interdependent with one another in a way that one cannot survive without the other.
The relationship between the fig wasp and the fig tree as described in the illustration would be symbiosis.
A symbiotic relationship is a form of mutualistic relationship between two organisms in which both of them benefit.
The fig wasp benefits the fig tree by helping with the pollination of their flowers. Without pollination, fertilization and seed production become impossible.
The fig tree, in return, benefits the fig wasp by providing a conducive environment for egg-laying. Without this environment, the fig wasp cannot lay eggs and the population of fig wasp will dwindle.
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What are the light-independent reactions in photosynthesis?
Answer:
In the light-independent reactions or Calvin cycle, the energized electrons from the light-dependent reactions provide the energy to form carbohydrates from carbon dioxide molecules. The light-independent reactions are sometimes called the Calvin cycle because of the cyclical nature of the process.
What can you conclude about the advantage of a double layer arrangement of a cell membrane
Answer:
The cell requires a barrier between itself and its environment.
Explanation:
hope I helped you let me know if u need anything :)
The process of making bread is an example of:
1) Cellular respiration
2) Alcoholic Fermentation
3) Aerobic Fermentation
4) Lactic Acid Fermentation
GIVING BRANLIEST HELP ME PLEASE!!!
Answer:
B I think, Good luck
Explanation:
Answer:
A: The ability to maintain homeostasis
Explanation:
Hope this helps:)
PLEASE HELP I HAS 5 MINUTES
Answer:
its ethier a or c
Explanation:
Impetigo.
Explanation....
It cannot be acne since this occurs when you are more in the teens and is not yellow, eliminate the last one.
It cannot be ringworm because they are worms and not apperanced by yellow crust, eliminate the second one.
It cannot be eczema since this is red not yellow, eliminate the first one.
Impetigo appears as yellow crust. Therefore, your answer is the third one, Impetigo.
The region within an atom that surrounds the nucleus and in which there is a high probability of finding an
electron is called a(n)
Answer:
Outer or electron shell
Explanation:
An atom is the smallest indivisible amount of matter. The atomic structure has been found to be divided into two regions namely: the NUCLEUS and the OUTERMOST ELECTRON SHELL. These regions contain the subatomic particles that make up the atom.
The nucleus contains the positively charged PROTON and NEUTRONS, while the electron shell, which surrounds the nucleus contains the negatively charged ELECTRONS.
The region within an atom that surrounds the nucleus and in which there is a high probability of finding an electron is called a(n) :
-Outer or electron shell
The region within an atom that surrounds the nucleus and in which there is a high probability of finding an electron is called a(n) Outer or electron shell.The atomic structure has been found to be divided into two regions namely the nucleus and the outermost electron shell.These regions contain the subatomic particles that make up the atom.Learn more :
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During which phase of mitosis do the chromosomes head
to opposite ends of the cell?
A.anaphase
interphase
B.metaphase
C.prophase
D.telophase
Answer:
CA __________________ is a place holder or object where you can store a value or piece of data named by you
Explain what would happen if the body's kidneys failed?
A. The body will not be able to produce enough blood.
B. The body will not be able get rid of waste products made by cells.
C. The body will not get sufficient amount of clean water.
D. The body will not be able to dispose of carbon dioxide in the blood.
Answer:
b:) the body will not be able to get rid of waste products made by cells
Explanation:
2. If someone had the list of traits you provided in question 1, do you think he or she would be able to find you in a group of 1000 people? Why or why not? If not, what other information encoded in your genes might distinguish you from the others in the group? What are other traits that are encoded for by DNA?
Answer:
No because theirs 1000 people and how they gonna find you if there's other people scattered around.☺
Explanation:
he basic functional unit of the nervous system is the neuron. What is the major function of this cell type
Answer:
They provide structure and support, facilitate growth through mitosis, allow passive and active transport, produce energy, create metabolic reactions and aid in reproduction.
