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3 years ago

Can someone help me answer this easy question ?

Biology

2 answers:

vlabodo [156]3 years ago

8 0

Answer:

Explanation:

It is caused from water running over the rocks, this usually takes a really long time.

sweet-ann [11.9K]3 years ago

7 0

See that river on the bottom? That water has been flowing in the canyon for a long time and has slowly been chipping away at the rocks to give what you see today.

B. erosion from the water

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Hunt and her team designed an experiment to test her hypothesis about the effect of BPA on mice. They administered daily doses o

katovenus [111]

Answer and Explanation: The figure below shows the doses of BPA administered to the female mice over time.

An experiment is used to determine cause and effect among variables. When the research is for the impact of a treatment, researchers randomly separate individuals in two groups:

Control Group doesn't receive any treament or a placebo or a treatment whose outcome is already known;
Treatment Group receives the treatment;

For the female mice on the image below, in the First Group is not injected any dosage of BPA, so they are the control group, while the others are treatment group.

The variables in a experiment are classified as independents or dependents:

Independent Variable is the cause;
Dependent Variable is the effect;

For the BPA research, since it is the effect of BPA over time on the mice's cells it is being investigated, dosage of BPA is the independent variable and time is the dependent variable.

6 0

3 years ago

Frank has Klinefelter syndrome (47, XXY). His mother has normal skin, but his father has anhidrotic ectodermal dysplasia, an X-l

Gala2k [10]

Answer:

b. Frank received the mutant chromosome from his father. Nondisjunction occurred in his father during the first meiotic division.

Explanation:

As you can see in the question above, Frank has Klinefelter syndrome which causes him to have normal skin patches and skin patches without sweat glands. Her mother has completely normal hair, which may indicate that the defective gene was not supplied by her. In addition, Frank's father has anhydrotic ectodermal dysplasia, an X-linked condition where the skin does not contain sweat glands.

Although Frank's father's defective gene is linked to the X chromosome, it is likely that Frank inherited the defective gene from his country. This may have occurred because during meiosis I, his father's genes did not show disjunction. As a result, Frank presents a mosaic of his phenotype, because an inactivation of the X chromosome occurred.

5 0

3 years ago

Starting with the atom and ending with the biosphere, record the Levels of Organization found in life.

finlep [7]

Atom -> molecule - organelle - cell - tissue - organ - organ system - organism - population - community - ecosystem - biosphere

There’s more to this but that’s whether you require more or less of the list

4 0

3 years ago

how is it possible mohave thousands of different proteins when there are only 20 different amino acids

TEA [102]

Hi there!

Although there are only 20 amino acids, these amino acids can combine into an innumerable amount of combinations to form different and unique proteins.

In case that doesn't make sense to you, I'll provide you with an analogy. You could be provided with 20 different LEGO bricks to work with. While there may only be 20 bricks, these bricks can combine into a vast amount of different formations, structures, etc. Amino Acids work in the same way.

8 0

3 years ago

A plant's stomata allow it to .fix nitrogen,absorb gasses or digest food

ludmilkaskok [199]

The stomata of a plant are microscopic slits on the leaves that serve the purpose of absorbing carbon dioxide from the surrounding air so that it can perform photosynthesis to make its own food and release oxygen into the atmosphere. The correct answer is B, absorb gasses.
Hope that helped! =)

4 0

3 years ago