Which of the following occurs

while homologous chromosomes

are paired up?

A. They create 2 haploid cells.

B. They contain 6 chromatids.

C. They exchange portions of their DNA.

D. They produce two diploid cells.

1. The original source of energy for most ecosystems is the

How does the enzyme telomerase meet the challenge of replicating the ends of linear chromosomes?

Describe how heart rate, stroke volume, and cardiac output respond to increasing rates of work. illustrate how these three variables are interrelated.

Which of these can decrease due to fertilizer in waterways?

What types of professionals support the physician and perform specific services ordered by the physician?

A virus is not considered a true living thing because it lacks one of the requirements of life. The ability to respond to stimuli The ability to reproduce The ability to grow and develop The ability to utilize a form of energy

What kinds of organisms require telomerase?

Suppose that a species of fish has split into two populations in a lake: one on the eastern side and one on the western side. How could you determine whether the two populations constitute different species? A.

Organisms interact with their environments, exchanging matter and energy. for example, plant chloroplasts convert the energy of sunlight to

What is the function on an ovary in a flower?