<u>Answer:</u>
<em>There will be 600 tall plants in that generation.</em>
<u>Explanation:</u>
In <em>Mendel’s cross the selected parents</em> are a tall pea plant and a short pea plant. Both the parents are homozygous. The recessive trait is short. Letter T represents tall and t represents short. Hence the <em>phenotype TT is homozygous dominant and tt is homozygous recessive.</em>
The genotype Tt represents tall since T is dominant over t. Mendel’s cross can be represented as
<em>
</em>
<em>
</em>
<em>F1 generation Tt Tt Tt Tt</em>
<em>F2 generation TT Tt Tt tt</em>
In the F1 generation all the plants are tall and in the F2 generation 3/4 plants are tall and1/4 plants are short.
In the question it is given that 200 plants are short in the F2 generation. Let total number of offspring in the F2 generation is x.
<em>x=800</em>
<em>number of tall plants = 
</em>
<em>
</em>
<em>Hence there will be 600 tall plants in the F2 generation. </em>
Answer: C) Colds are caused by viruses
Explanation:
Antibiotics kill all the bacteria in your body. Colds are not an illness from bacteria, they are viruses and just have to run their course.
Answer:
A theory in biology that includes one or both of the statements that the cell is the fundamental structural and functional unit of living matter and that the organism is composed of autonomous cells with its properties being the sum of those of its cells.
Explanation:
Answer:
11B (reproduce). 12C (be eaten). 13A (variation). 14C (better adapted). 15C (Darwin). 16A (evolved). 17C (competition).
Explanation:
11 - The key principle underlying evolution by natural selection is that traits are only passed on if the organism survives long enough to reporduce. An adaptation that increases its likelihood of survival will therefore increase the chance it will reproduce.
12 - Deer rely on their brown fur to remain camouflaged in the forest so that predators can't see them. A white deer will stand out and will be seen by predators and eaten.
13 - This is the definition of variation. The variation becomes an adaptation if it actually benefits the organism in some way in its environment. A variation could also be neutral (doesn't affect the organism) or deleterious (bad).
14 - See previous question.
15 - Darwin developed the theory.
16 - This is describing the process of evolution.
17 - This is an example of competition.
