The tiny hollow air sacs in the lungs where gas exchange takes place are the?

How would you compare the x and y chromosome in regard to size and number of genes?

A nurse is orienting a newly admitted client to the client's bedroom environment in a long-term care facility. the client tells the nurse, "i have difficulty hearing. i left my hearing aids at home.

Suggest why the presence of the sieve plate is often cited as evidence against the pressure-flow model for phloem transport

Which accurately describes the relationship between cancer risk and exposure mutagens?

A situation in which a gene has more than two alleles is known as a. incomplete dominance. b. codominance. c. polygenic dominance. d. multiple alleles

Which describes the habitat of a frog?

The size of a population refers to the

An electric current will always follow a. the path of least resistance. b. a path toward the north pole. c. a path toward the south pole. d. the path that leads through insulators.

What are some questions that biologists might ask about the living things they study?

A volcanic eruption causes melting of glaciers. Which of these Earth systems interact during this event? A atmosphere and biosphere B atmosphere and hydrosphere C geosphere and cryosphere D geosphere and biosphere