Photosystem II provides the electrons necessary for the entire photosynthesis process by replacing lost electrons with electrons obtained from the splitting of water.
By oxidising water to produce hydrogen ions and molecular oxygen, the energetic electrons are swapped out for new ones. The photosystem II. Photosystem II provides the electrons necessary for the entire photosynthesis process by replacing lost electrons with electrons obtained from the splitting of water. The hydrogen ions (protons) produced when water is oxidised contribute to the formation of a proton gradient that ATP synthase uses to produce ATP.
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Which of these is the most likely reason that a population might crash?
Answer:
The carrying capacity of the environment suddenly drops.
Explanation:
Beginning at the synapse of a neuron, place the events in neuronal signaling in the correct sequence. 1. Ion channels bind the ligand and open. 2. Na is pumped out of the cell, and the membrane potential is restored. 3. Acetylcholinesterase breaks down acetylcholine. 4. Na enters the postsynaptic cell, and the membrane potential changes. 5. Acetylcholine is released into the synapse. 6. Na ion channels close. 4, 5, 1, 2, 6, 3 6, 4, 3, 1, 2, 5 3, 4, 6, 1, 5, 2 1, 2, 3, 4, 5, 6 5, 1, 4, 3, 6, 2
Answer: 5, 1, 4, 3, 6, 2
Explanation:
The synapse is an intercellular approach between neurons or between a neuron and a muscle or glandular effector cell. At the synapse, the transmission of the nerve impulse takes place. This is initiated by a chemical discharge that causes an electrical current in the membrane of the presynaptic cell (sending cell). Then, once this nerve impulse reaches the end of the axon (the connection with the other cell), the neuron secretes a chemical compound called neurotransmitter that is deposited in the cleft or synaptic space (intermediate space between this transmitting neuron and the postsynaptic or receiving neuron). These secreted substances or neurotransmitters (noradrenaline and acetylcholine among others) are responsible for exciting or inhibiting the action of the other cell called postsynaptic cell.
The events are:
Acetylcholine is released into the synapse (5): Acetylcholine is a neurotransmitter that is released at synapses in response to a specific stimulus. The secreted neurotransmitter acts on specialized receptor sites on the postsynaptic cell, which causes changes in the metabolism of the postsynaptic cell, modifying its cellular activity. Ion channels bind the ligand and open (1): The channels control the transmission between neurons because they bind neurotransmitters and open in response to a ligand. So the neurotransmitters diffuse across the cleft and bidn to receptors.Na enters the postsynaptic cell, and the membrane potential changes (4): Sodium channels open and allow an inward diffusion of sodium ions (Na+) from the outside to the inside. This causes the membrane potential to become less negative or more positive or to approach the threshold potential. Next, this triggers an excitatory potential (EPSP) so it causes the postsynaptic membrane to depolarize and fire an action potential. which spreads along the membrane of the post-synaptic neuron. This means an impulse is transmitted.Acetylcholinesterase breaks down acetylcholine (3): Acetylcholinesterase is an enzyme that breaks down the neurotransmitter so it causes the inactivation of acetylcholine into acetic acid and choline. Na ion channels close (6): Na channels open and close according to different signals. The peak voltage causes them to close, and potassium channels open. So sodium ions stay inside the cell while potassium ions move outside of it. When this happens, repolarization (change in membrane potential that retunrs it to a negative value) takes place. Potassium channels remain open after the potential reaches the resting level causing hyperpolarization (the membrane potential becomes more negative) and it alters the ability of certain of ions to enter the cell. At the end, the cell has more K+ ions on the outside.Na is pumped out of the cell, and the membrane potential is restored (2): The sodium-potassium pump moves sodium ions to the outside and potassium ions to the inside.A biologist is using a dichotomous key to identify fish.
1. (a) Has a single dorsal fin ® 5
(b) Has a double dorsal fin ® 2
2. (a) One fin is spiny, the other is smooth ® 3
(b) One fin is not spiny or smooth ® 4
5. (a) Has small fin on back near tail ® 6
(b) Has no fin on back near tail ® 7
6. (a) Has barbs near the mouth ® Catfish
(b) Does not have barbs near the mouth ® 10
7. (a) Tail is asymmetrical ® 8
(b) Tail is symmetrical ® 9
10. (a) Scales are small ® Trout
(b) Scales are large ® Whitefish
What is the next step to take to identify a fish that has a single dorsal fin and no fin on the back near the tail?
step 5
step 2
step 7
step 6
Answer:
The next step to take to identify the fish is step 7.
Explanation:
A dichotomous key is relatively simple to interpret. All you need to do is to:
carefully observe your organism, know some technical terms or have a biological dictionary, and follow the descriptions.The dichotomous key is going to lead you to the answer. Each step states two descriptions -a and b-, that are the potential answers. You need to observe your specimen and see which of the descriptions matches the organism. Once you choose the correct description, the key leads you to the next step. In the next step, the procedure is the same. You have to repeat it until you reach the name of your organism.
So, in this example, our organism is a fish, and we know that it has a single dorsal fin and no fin on the back near the tail. So,
1. (a) Has a single dorsal fin ---------------- step 5
(b) Has a double dorsal fin ----------------step 2
We have two options, single dorsal fin or double dorsal fin. Our fish has a single dorsal fin, so the correct option is (a). By choosing (a), the key sends us to step 5. Note: In the hypothetical scenario of having a double dorsal-finned fish, the correct option would be (b), which would lead us to step 2.
5. (a) Has small fin on the back near tail ---------- step 6
(b) Has no fin on the back near tail -------------- step 7
Again, we have two options, with a back fin near the tail, or without. Our fish does not have any back fin near the tail, so we choose option (b). This option leads us to step number 7. Note: In the hypothetical scenario of having a fin in the back near the tail, we should choose option (a), which leads us to step 6. But this is not the case. So we go to step 7.
7. (a) Tail is asymmetrical --------------- step 8
(b) Tail is symmetrical ----------------- step 9
Once in 7, we need to see if our specimen has a symmetrical or asymmetrical tail. Depending on the answer, we go to step 8 or 9. And so on until we get to know the name of the fish.
Answer: The correct answer is step 7
Explanation: Confirmed correct.
What biome is Alabama in
Answer:
Deciduous forest biome
Explanation:
Deciduous forests are found in the following states in the U.S: Florida, Georgia, South Carolina, Alabama, Virginia, parts of Texas and Tennessee. Among the countries in Europe that have Deciduous forest biome include Italy, Spain, France, Bulgaria, Poland and much more.
Miss Emily's hometown in Alabama is the town in which William Faulkner's story "A Rose for Emily" is set, while Woodstock is a small community in Bibb County, Alabama. Despite the fact that the two places are distinct, there are a few similarities between them.
First and foremost, both towns are situated in Alabama, which means that they share a geographic location. Both towns are in the Deep South, a region known for its sultry climate, and both are located in rural areas. This implies that the two towns are exposed to comparable weather patterns and experience similar seasons throughout the year.
Second, both towns have a rich history, which is reflected in their architecture and cultural traditions. For example, Miss Emily's hometown has a beautiful but decaying old Southern mansion, which is symbolic of the town's former glory. Similarly, Woodstock, like many other small towns in the region, has numerous old homes and buildings that are over a century old.
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I need helo with one please help and if you can do number 2 that would be good please help
Answer:
1.
✔Deep sea trenches
✔Mountains
✔Faults
2.
B. It is an ancient supercontinent
Explanation:
The above answers are correct.
The convergent plate boundary is known to be an area on Earth where subduction occurs. It is a place where two or more lithospheric plates collide. This convergent plate boundary is characterized by deep ocean trenches, island arcs, mountain ranges, faults and volcanoes.
Pangaea is known to be a supercontinent that actually incorporated almost all the earth's landmasses and it is said to have existed during the late Paleozoic and early Mesozoic eras. It is revealed that over 150 million years the supercontinent began to break apart.
Please I need help on this
Answer:
C: Converting radiant energy into chemical energy.
Explanation:
Only plants (producers) in a typical ecostystem can convert radiant energy into chemical energy.
Answer:
Converting Radiant energy into Chemical energy.
Explanation:
There are two main purposes for plants. 1. Providing oxygen 2. serving as producers. As we know, plants take in the sunlight from the sun and make glucose with it. This glucose in its form is chemical energy that benefits both the plants, or the consumers that eat them, or some parts of the plant. It does not talk about oxygen or atmosphere except for nitrogen, which they actually get from the ground. Therefore, Converting Radiant energy into Chemical energy would be the right answer.
41 points and BRAINIEST 11. A species of rodent can either have brown fur or white fur. Brown fur is recessive and white fur is dominant. Which of the following would cause the rodent population to not be in Hardy-Weinberg Equilibrium? (2 points) Situation In Hardy-Weinberg Equilibrium? Brown fur allows rodents to hide more easily White fur attracts mates better. Rodents cannot leave or enter their habitat The rodents mate randomly, The rodents mutate a new allele for gray hair
( I don't understand what to write in the box thing)
Answer:
i think yes in 3 4 5 not in 1 2. It's asking if the genetic situation applies to the hardy equillibrium.
Explanation:
Please the following steps of photosynthesis in order
Answer:
sunlight obsorbed
water is split
glucose formed
glucose used
oxygen released
Explanation:
Which of the following represents a heterozygous genotype?
A. GG
B. gg
C. Gg
D. none of the above
Answer: C) Gg
Explanation:
A heterozygous mixtures include two different genes:
A Dominant and a Reccessive gene. Inorder to have a mixture, you need two different genes, explaining why it would be C.
Can someone please help
Answer:
Malleable : Able to be Hammered or rolled into a flat sheet.
Ductile : Able to be pulled into a long wire.
Conductivity : Ability to move heat or electricity to another object.
Reactivity : the ease and speed an atom has combining with other atoms
The female part of the flower consists of:
Choose all that apply.
A. style
B. stamen
C. stigma
D. ovary
Answer:
A. style.
D. ovary.
goodluck!
Answer:
A. style.
D. ovary.
Explanation:
Hope this helps
FILL IN THE BLANK!
Water leaves the cryosphere and joins the rest of the hydrosphere when it
Answer: receives the thermal energy
Explanation:
The cryosphere can be defined as the land which is covered with the surface of ice in the solid form in the form of sea ice, river ice, snow, ice glaciers, ice sheets, frozen water, and others. When the ice on the land receives the thermal energy from the sun or any other source like radiation then it melts into water and it becomes the part of the water body in the form of the hydrosphere.
In some carnations, red is co-dominant with white. What might the heterozygote look like?
1. Pink
2. Red with White speckles
3. Red
4. White
Answer: Red
Explanation:
Sorry if I'm wrong
In multicellular organisms, tissues are comprised of
a systems
b organs
c cells
d blood
Answer: B organs
Explanation:
Help with this pls I'm very counfused and it's due in 1 hours. 
Answer:
OH HELL NAW NOT A WHOLE LONG ASH QUESTION PAGE
Explanation:
Answer:
Explanation:
How much marks will you give for this????
Select all true statements
Answer:
where is the question of this picture?
arrange the items listed into different groups. Give each group a title indicating what the members of that group have in common.
Apples, peas, orange, banana, carrot, lettuce, turnip, pear, grape, potato
Answer: The caterogries are fruit and vegtables
Explanation: The fruits are: apple, orange, banana, pear, and grape. The vegtables are: peas, carrot, lettuce, turnip, and potato
We classify the given fruits and vegetables on the basis of true seeds and bogus seeds.
True seeds: Apple, Peas, Orange, Lettuce, and Pear.Bogus seeds: Banana, Carrot, turnip, grapes, and Potato. What do you mean by Seeds?Seeds may be defined as a reproductive unit of flowering plants which are capable of inducing other identical plants.
Banana, potato, grapes, orange, apple, etc. have fleshy endocarp that surrounds either the true seeds or bogus seeds.
Sometimes, bogus seeds are not visible with our bare eyes.
Therefore, it is well-differentiated above.
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At Weeks Bay there was a population of 200 alligators. In May of 2006 a new species of catfish was released into the Mississippi. These catfish reproduce very fast and soon become a rich food source for the alligator population. This provides the alligators with the energy needed for more successful reproduction. The following summer of 2007, 100 babies were born and a total of 40 gators died that year. However, the next year in early 2008 there was a terrible drought, causing 100 alligators to die.
1. What was the population size of alligators during the summer of 2007?
WILL MARK BRAINLY
Answer:
1. 260
2.
3. drought
4. babies born
6. carrying capacity
7. population density
8. logistic growth
9. exponential curve
Explanation:
NEED HELP
In a population of cats, a gene that controls an observable trait has several different alleles. Which of the following best explains how genetic drift might affect the genetic makeup of this cat population over time?
It is a directed process, so it might cause an increase in the gene pool's allele frequencies.
It is a nonselective process, so it might cause an allele to disappear from the gene pool by chance.
It is a random process, so it might cause a population to reach genetic equilibrium.
It is a selective process, so it might cause an increase in the population's genetic variation.
Answer: It is a nonselective process, so it might cause an allele to disappear from the gene pool by chance brainliest?
Explanation:
This is a multiselect question! Select ALL of the following that correctly describe the
function of stem cells:
A)Cells that can differentiate into (become) any type of cell. Ex. blood, muscle, skin
cells.
B)Cells that can renew themselves continuously.
C) Cells that cannot specialize into different types of cells.
D) Cells that come from bone marrow or embryos.
Answer:
A, B, and D
Explanation:
Stem cells are special human cells that are able to develop into many different cell types. They commonly come from bone marrow, and from embryos.
Which adaptation to a dry climate most helps the elephant tree continue to grow by reducing the loss of moisture?
A
a deep root system
B
loss of leaves during a drought
C
photosynthesis in the bark
D
closing of stomata in daylight
a - a deep root system
The closing of stomata in daylight is an adaptation to a dry climate most helps the elephant tree continue to grow by reducing the loss of moisture (Option D).
What is an adaptation?An adaptation is a phenotypic feature that allows an organism to survive in particular environmental conditions.
Stomata are structures in plants that allow the interchange of gases required during photosynthesis.The closing of stomata represents an adaptation to arid conditions because it avoids water loss.In conclusion, the closing of stomata in daylight is an adaptation to a dry climate most helps the elephant tree continue to grow by reducing the loss of moisture (Option D).
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4)
In which case will a mutation change the phenotype of the organism?
A)
If the mutation codes for the same amino acid
B)
If the mutation codes for a different amino acid, but the protein shape does
not change
If the mutation codes for a premature stop codon
D)
If the mutation occurs in an intron
Answer:
C.) If mutation codes for a premature stop codon
Explanation:
This would cause an incomplete protein
Which government department is responsible for the conservation of soil and water? O the Department of Agriculture and Forestry O the Department of Environmental Quality O the Department of Natural Resources the Department of Wildlife and Fisheries
Answer: The Department of Agriculture and Forestry (Answer: A)
Explanation:This is 100% the correct answer. No cap.
Answer:
A
Explanation:
Help me with these pleaseeeewe
Answer: 13. The magnets in Set 1 will repel, The magnets in Set 1 will attract,The magnets in Set 1 will not move. 14. Set 2 will attract, and the magnets in Set 2 will repel, and the magnets in Set 2 will attract. brainliest?
Explanation:
suppose that the local temperate changed in favor of greater oxygen levels in the water. write a short paragraph to describe how both the population of the small fish species and the wading bird population would change in response to the new oxygen lovers over the next six months. then explain why these changes occur
Explanation:
suppose that the local temperate changed in favor of greater oxygen levels in the water. write a short paragraph to describe how both the population of the small fish species and the wading bird population would change in response to the new oxygen lovers over the next six months. then explain why these changes occur
In an area where trees are growing taller, the giraffe population must adapt if it is to survive. Which statement BEST explains how the giraffes would be able to survive and reproduce?
F The genetic material for neck length within the offspring must mutate.
G The trait for longer legs would have to be a response to the change in the environment.
H The genetic material for smaller, shorter hind legs must exist within the giraffe population.
J The trait for longer necks must exist within the population and be inherited by the offspring.
Answer:
J. the trait for longer necks must exist within the population and be inherited by the offspring
Lamarckism was the theory was given by Lamarck and is based on physical changes. Giraffes would be able to survive when the traits of the long necks are inherited. Thus, option J is correct.
What is inheritance?Inheritance is the passing of the genetic material down the generation so that the beneficial traits that are essential for survival are passed from one generation to another.
When the trait essential for the giraffes to survive like long necks and legs are passed from one generation to another through reproductive methods then they will be able to survive.
Therefore, option J. trait for the longer neck must pass or be inherited by offspring.
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Help me out pleaseeeeeeees
Put the following actions in order: DNA replicates, cell grows, cell divides,
cell prepares for mitosis.
DNA replicates, cell grows, cell prepares fro mitosis, cell divides
cell grows, DNA replicates, cell prepares for mitosis, cell divides
cell grows, cell prepares for mitosis, DNA replicates, cell divides
DNA replicates, cell prepares for mitosis, cell grows, cell divides
Answer:
cell grows, DNA replicates, cell prepares for mitosis, cell divides
Explain your reasoning I will give u Brainliest
Answer:
1. A
2. B
Explanation: #2 is B because sedimentary rocks have layers that you see in places such as canyons. Sedimentary rocks are made from grains so you can see that kind of texture in the image. Igneous rocks are made from the cooling and solidification of lava. They have that shiny texture.
Hope this helps! :)
Answer:
1. A
2. B
Explanation:
1. Igneous rocks are formed from by lava, Igneous rocks are various crystalline or glassy rocks formed by the cooling and solidification of molten earth material
2. Sedimentary rocks are formed from pre-existing rocks or pieces of once living organisms. They form from deposits that accumulate on the Earth's surface
This is related to the serengeti book by sean b carol
Answer:
i dont about this question ❓