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Sindrei [870]
4 years ago
8

In humans the X and Y chromosomes which determine the

Biology
2 answers:
xxTIMURxx [149]4 years ago
7 0

In humans the X and Y chromosomes which determine the gender.

The answer is "gender".

KatRina [158]4 years ago
5 0

The female has two XX and the male has a XY chromosome

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A white poster board looks white because the light waves are being ______ while a black poster board looks black because the lig
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The answer is D. Reflected vs Absorbed

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Black shirts get so hot because it's absorbing all light whereas white is colder because it's reflecting all light

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why do plant cells occasionally switch from noncyclic electron flow (nef) to cyclic electron flow (cef)?
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Creating a proton gradient across the thylakoid membrane in higher plants uses cyclic electron flow (CEF), which primarily serves two purposes: (1) producing ATP and balancing the ATP/NADPH energy budget; and (2) defending photosystems I and II from photoinhibition.

ATP and NADPH are produced by noncyclic electron transport. The single product of cyclic electron transport was ATP. Both steps are required by a plant to produce the required amount of ATP for the Calvin Cycle. The electrons are released by photosystem I and then brought back into the system during cyclic photophosphorylation. However, in non-cyclic photophosphorylation, the electrons that the photosystems emit do not come back.

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3 years ago
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4. Many of your body’s responses operate off of either negative or positive feedback loops. When you are cold, you shiver. Expla
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The tendency to maintain a stable, relatively constant internal environment is called homeostasis. The body maintains homeostasis for many factors in addition to temperature. For instance, the concentration of various ions in your blood must be kept steady, along with pH and the concentration of glucose. If these values get too high or low, you can end up getting very sick.

Homeostasis is maintained at many levels, not just the level of the whole body as it is for temperature. For instance, the stomach maintains a pH that's different from that of surrounding organs, and each individual cell maintains ion concentrations different from those of the surrounding fluid. Maintaining homeostasis at each level is key to maintaining the body's overall function.

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7. Why do molecules moving from high to low concentration need to use energy?​
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During active transport, substances move against the concentration gradient, from an area of low concentration to an area of high concentration. This process is “active” because it requires the use of energy (usually in the form of ATP).

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