B. is the answer hope this helps
Answer:
The correct answer will be option-A
Explanation:
A scientific experiment is designed in a way that it tests the predicted hypothesis and so contains the three different types of variables namely: independent (can be modified), dependent (to be studied) and the control (kept constant and unchanged).
In the given question, since the scientists studied the effect of nitrate and phosphate in which he provided the plant samples with nitrate and phosphate but he missed the control sample which should lack the variable to be tested that is nitrate and phosphate. This control variable helps the scientist to study the relationship between other samples.
Thus, option-A is the correct answer.
Answer:
See the answer below
Explanation:
From the illustration, the yellow color trait is dominant over the green trait.
<em>Assuming that yellow seededness is represented by the allele Y and green seededness by the alleles y. Y is dominant over y, hence a yellow seeded plant would be either YY or Yy while a green seeded plant would be yy.</em>
For a cross between a yellow seeded plant and a green seeded plant to yield all yellow seeded offspring, it means that the parents are YY and yy.
(yellow)YY x (green) yy
F1 progeny: All Yy (yellow)
Now, Yy is crossed with green-seeded plant, yy.
Yy x yy
Yy Yy yy yy
Hypothesized Genotypic ratio
Yy = 1/2
yy = 1/2
Hypothesized Phenotypic ratio
Yellow seeded = 1/2
green seeded = 1/2
Answer:
what are the answer choices
Explanation:
Answer:
Well, it's emitted from the sun as ultraviolet energy but when it reaches earth not all of it stays there. Some of it gets reflected back into space, some of it is absorbed by the earth's atmosphere, and some by the earth itself, it's surface.
Explanation:
Hope this helps :)