Two pink-flowering plants are crossed. the offspring percentages are 25% red, 25% white and 50% pink. if a red-flowering plant was crossed with a white-flowering plant what would the phenotypes of the offspring be?

All the offspring would be of pink color

Explanation:

Let R represents the allele for red color of flower

r represents the allele for white color of flower

Here R  and r can occur co dominantly thereby producing pink color flower with genotype "Rr"

Now , it is given a cross is carried out between a red flowering plant "RR" and a white flowering plant "rr".

The cross between the two parents is represented as below-

RR

rRrRr

rRrRr

Thus, all the offspring would be of pink color

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4. viruses

5. antibodies

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.