When an action potential reaches the presynaptic terminal it causes channels to open?

Answers

Answer 1
Answer: yes calcium ion channels open and cause the neurotransmitters to move as well

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A major unit of the genetic code is called a(n) _____. chromosome genome RNA gamete
During which process do alleles undergo segregation?a. DNA replication.b. Mitosis.c. Meiosis.d. Transcription.
The most easily polluted groundwater reservoirs are A. water-table aquifers. B. sewage plant reservoirs. C. salt reservoirs. D. artesian wells.

The cellular process of creating two new DNA molecules from one original copy is called replication. Which statement is the BEST description of this process? A) DNA opens up and RNA copies it. B) DNA opens up and completely unwinds to make two new molecules. C) DNA opens up and each strand is used as a template for a new strand. D) RNA opens up the DNA and uses each strand as a template for a new strand.

Answers


The correct answer is C.

In replication, an initiator protein unwinds a short length of  the DNA double helix. Next, an enzyme known as helicase attaches itself  to the unwound helix and begins to break the hydrogen bonds  between the base pairs of the two DNA strands, thereby pulling them apart to form a Y  shape called a replication fork. The two separated strands act as  templates for making the new strands of DNA.

An enzyme DNA polymerase then binds to one of  the strands called the leading strand because it is the one oriented in the 3'  5' direction (towards the replication fork) and begins walking along it adding new complementary bases to it. After the new strand is proof read by DNA Polymerase, it is sealed  up by  DNA ligase, an enzyme specific for this task.

The other strand called the lagging strand because it faces way from the from the replication fork in 5' 3' direction also undergoes the same process with a few minor differences to produce the other new complementary strand.





The Correct answer is C: DNA opens up and each stand is used as template for a new strand

Which of the following describes a structure that both prokaryotic and eukaryotic cells have in common?

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there are no options but the answer is in the attachment..

Two long tubes of muscle that lead from the stomach and help absorb food are the _____ and the_________ .

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I think they are the small and large intestines, thought I don't think they are muscles. they are organs.

Used fuel assemblies are typically considered _______. a. low-level waste b. uranium mill tailing c. high-level waste d. all of the above

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Answer: c. high-level waste

Explanation:

The used or spent fuel comes from the nuclear reactor that can be no longer efficient to be used again for the purpose of generating electricity, because the efficiency to conduct fission reaction by such fuel is low. But still it may be thermally hot, highly radioactive and harmful. It comes under the category of high level wastes. The high level wastes are those wastes that are produced as a byproduct of the nuclear reactors.

Answer:

High-Level waste

Explanation:

I just took the test !

Please help!!! Below is a scenario about an experiment; there are three questions referring back to this scenario, so read it carefully. Sherri wanted to test what fertilizer worked best on her tomato plants. She bought 4 different brands of fertilizer, and five tomato plants. She labeled each plant A-E. She did not give plant E any fertilizer. Each plant was kept in the same location, with the same amount of sunlight, and given the same amount of water each day. Each day at noon she measured her plants. 1. What is the independent variable in this scenario? - The type of plant - The growth of the plants - The amount of water given - The fertilizer given 2. What is the dependent variable? - The type of fertilizer - The amount of water given to each plan - The type of plant - Daily plant growth 3. Select all of the controlled variables present. - The type of plant - The type of fertilizer - How much sunlight the plants receive - How much water they receive daily

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Answer:

Independent variable: The fertilizer given

Dependent variable: Daily plant growth

Constants: How much water they receive daily, How much sunlight the plants receive, type of plant (tomato plant)

Explanation:

Independent variable of an experiment is the variable that is changed or manipulated by the experimenter in order to bring about a measurable response. In this experiment where Sherri wanted to test what fertilizer worked best on her tomato plants. She used 4 different brands of fertilizer. Hence, the FERTILIZER is the independent variable

On the other hand, the dependent variable is the variable that is measured in the experiment. It is the variable that responds to the independent variable. In this experiment, the DAILY PLANT GROWTH is the dependent variable.

Constants are variables that are kept unchanged or constant throughout the experiment. In this case, the constants or controlled variables are: : How much water they receive daily, How much sunlight the plants receive, type of plant (tomato plant)

Final answer:

The independent variable in Sherri's experiment is the type of fertilizer used. The dependent variable is the daily growth of the plants. The controlled variables include the type of plant, the amount of sunlight received, and the amount of water given daily.

Explanation:

In this experiment, the independent variable is the fertilizer given to each plant. This is because the type of fertilizer is what is being changed or manipulated in this experiment to observe the potential changes or effects on the plants.

The dependent variable in this scenario is the daily plant growth. It is called 'dependent' because its value might change depending on the effect of the independent variable (the fertilizer).

The controlled variables for the experiment are the type of plant, how much sunlight the plants receive, and how much water they receive daily. These are conditions that were kept the same for each plant to ensure that the only difference between the plants was the type of fertilizer used.

Learn more about Variables in Experiments here:

brainly.com/question/33710842

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Once the carrying capacity for an organism in a system is exceeded, the population of the organism will most likely __________ over time. A) increase exponentially B) stabilize C) decrease slowly D) collapse

Answers

Answer:

Explanation:

I know it is not  B) Stabilize

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