A eukaryotic cell has:

A

a true nucleus and membrane bound organelles.

B

no nucleus and no membrane bound organelles.

С

a true nucleus and no membrane bound organelles.

D

no nucleus and membrane bound organelles.

How does the creation of a new mountain range in an ecosystem affect an animal population that becomes divided into two groups by the mountains?

Which of the following best describes a sex-linked trait? A. a trait determined by a gene located on an individual's Y chromosome only B. a trait whose expression depends on whether an individual is male or female C.

What do the viruses that cause HIV, hepatitis, and Ebola have in common?

When a surgeon is operating on a bone great care is taken to preserve the periosteum. Why is it important to bone healing to take care of this delicate structure?

The theory says that the big bang produced the chemical elements hydrogen and helium. What evidence supports this? You find an abundance of both hydrogen and helium in all matter. A. You find an abundance of both hydrogen and helium in all matter. B.

Why do scientist publish their work

In pea plants, the allele for purple flowers (p) is dominant to the allele for white flowers (p). in a cross between a purple-flowered plant and a white-flowered plant, all 73 of the offspring plants had purple flowers.

1. The first choice on a dichotomous key is: "1A. Are wings covered by an exoskeleton? vs. 1B. Are wings not covered by an exoskeleton?" Which organism is separated from the others by this question?

b. Explaining A friend claims that pea plant grow faster than corn plants. Could you investigate this idea through scientific inquiry? Explain.

Why is a disease like osteoarthritis not considered an infectious disease?