CP BIOLOGY 2ND SEMESTER EXAM

Front

What is nitrogen fixation?

Back

The process of converting atmospheric nitrogen (N2) into a form that plants can use, primarily done by certain bacteria.

Front

What are homologous structures?

Back

Structures in different species that have a similar internal structure but serve different functions, indicating a common ancestor.

Front

What are analogous structures?

Back

Structures in different species that serve similar functions but have different internal structures, indicating no common ancestry.

Front

What is a climax community?

Back

A stable and mature ecological community that has reached the final stage of ecological succession.

Front

What is secondary succession?

Back

The process of ecological recovery that occurs in an area where a disturbance has destroyed a community but left the soil intact.

Front

What is the difference between dominant and recessive alleles?

Back

A dominant allele masks the effect of a recessive allele in a heterozygous genotype.

Front

What is the genotype of a rough coat boar (R) and a soft coat sow (r) that produce 50% rough and 50% soft coat offspring?

Back

The genotype of the parents must be Rr (rough coat) x rr (soft coat).

Front

What is the role of decomposers in an ecosystem?

Back

Decomposers break down dead organic matter, recycling nutrients back into the soil.

Front

What is the significance of moss and lichens in primary succession?

Back

Moss and lichens are often the first organisms to colonize bare rock, helping to create soil for other plants.

Front

What is natural selection?

Back

The process by which organisms better adapted to their environment tend to survive and produce more offspring.