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Zigmanuir [339]
3 years ago
7

Which observation would be the best evidence for a recent founder event or population bottleneck?

Biology
1 answer:
Bingel [31]3 years ago
7 0
The best evidence of such phenomena could be a population's genetic variation decrease.
When a population bottleneck occur it means that for some reason (i.e. environmental events) the size of a population is largely reduced. This leads to reduction of the genetic variation in that new smaller population. When a bottleneck occur, the founder effect is normally seen, which is that one population is established by a small group of a previously larger population leading once again the genetic variation, now though with a bigger population, to be very reduced.
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Chloroplast structure and function
Lana71 [14]

Answers:

A) The membranes of the Chloroplast are the  

1) Thylakoid membrane 2) Envelope membrane

B) Calvin cycle occurs within the stroma, while light reactions occur within the thylakoid membrane.

Explanation:

Generally, the chloroplast is made up of the; <u>Thylakoid membrane and Envelop membrane</u>. The thylakoid membrane is basically the region for light absorption, thus making it the site for light reactions within the chloroplast.  

Calvin cycle, which occurs in the stroma, involves light independent reactions. It occurs shortly after the light-dependent reactions, and further breaks down ATP and NADPH, products of the light reactions.

The stroma is located outside the thylakoid membrane.

For the remaining listed organelles:

1) The Cytosol- It’s the liquid space within the cell. The chloroplast can be found floating within the cytosol of any involved plant cell.

2) Thylakoid space- The space within the thylakoid.

3 0
3 years ago
5) Strawberry plant clones are given different amounts of water for a 3-week period. First strawberry plant
Natalka [10]

Answer:

IV: Amount of water

DV: Height of the strawberry plant

CG: The fourth strawberry plant

Con: Type of strawberry plant, type of water given, type of soil used, amont of sunlight.

Explanation:

When you say <u>independent variable</u> this is the variable in a study that you change or manipulate. In this case, the amount of water is the one that is changing per plant. This is done to test whether this variable will have an effect on another.

The <u>dependent variable</u> is the variable that is not changed by the researcher or scientist. The changes in this variable is what you'd like to take note of. The changes that the dependent variable "depends" on the indepedent variable. This means that the dependent variable is the one affected. In this case, it would be the height.

<u>Control Group </u>is the group that you are not going to test with the Independent variable. We do this to determine or rule out any other intervening variables that may cause a change. If the result of the study would be that there is not difference between the other group and the control group, then that would mean that the independent variable may not have had any effect on the dependent variable. Another purpose to a control group is to provide also a baseline to track changes.

<u>Controlled variables </u>are variables that are kept constant. This is also to eliminate or prevent other variables from interfering with the results. It ensures that only the independent variable is what is causing the change. If there were no controls to this particular experiment, you will not be able to properly conclude that it is indeed the amount of water that is causing the change.

7 0
3 years ago
The process whereby an unspecialized cell changes into a more specialized cell is known as which of the following?
trapecia [35]
Answer: Differentiation is the process by which unspecialized cells become specialized to carry out distinct functions. A stem cell is an unspecialized cell that can divide without limit as needed and can, under specific conditions, differentiate into specialized cells.
3 0
3 years ago
Being able to readily diffuse material through itself, such as occurs in alveoli, is a characteristic of which type of epithelia
Karolina [17]

Answer: Simple squamous epithelium

Explanation:

The simple squamous epithelium can be define as the layer of flat cells which can be found in contact with the basal lamina. This layer is permeable to allow the molecules to pass through the membrane for diffusion and filteration.

The diffusion of carbon dioxide and oxygen from the membrane of epithelia is also facilitated by the simple squamous epithelium.

7 0
3 years ago
Read 2 more answers
Which of the digestive processes above will be found in the chemical change section of the Venn diagram shown above?
LekaFEV [45]
The answer is 2x8{g5}
7 0
2 years ago
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