Review II

Front

Viruses can reproduce on their own.

Back

False. Viruses cannot reproduce independently; they require a host cell to replicate.

Front

Which of the following is not needed for photosynthesis to occur?

Back

Oxygen. Photosynthesis requires sunlight, carbon dioxide, and water, but not oxygen.

Front

What is the probability of hh when HH is crossed with Hh?

Back

0%. The cross HH x Hh can only produce HH and Hh offspring.

Front

What does Chargaff's rule state for DNA?

Back

A=T and G=C. Chargaff's rule indicates that in DNA, the amount of adenine equals thymine, and the amount of guanine equals cytosine.

Front

What best illustrates natural selection?

Back

An organism with favorable genetic variations will tend to survive and breed successfully.

Front

Define photosynthesis.

Back

Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll.

Front

What is the role of chlorophyll in photosynthesis?

Back

Chlorophyll is a pigment that absorbs sunlight, providing the energy needed for photosynthesis.

Front

Explain the concept of genetic variation.

Back

Genetic variation refers to the differences in DNA sequences among individuals, which can lead to different traits.

Front

What is the significance of the Hardy-Weinberg principle?

Back

The Hardy-Weinberg principle provides a mathematical model to study genetic variation in a population under ideal conditions.

Front

What is the function of ribosomes in a cell?

Back

Ribosomes are the cellular structures responsible for protein synthesis.