Animals that have been exposed to hazardous materials present no danger to people.

a. true

b. false

Burning temperatures, such as those of a hot stove top, are perceived by which component of a reflex arc?

Weather describes the average conditions of an area over long periods of time? True or false

Why is the hardwwod industry a threat to the environment

The epidermal layer that consists almost entirely of keratin is the

Bruce Ames constructed a mutagenicity test which initially missed carcinogens which were noncarcinogenic to the tester strains. Why? a. tester strains were more resistant to the mutagenic effects of the carcinogen than eukaryotes b.

Which of the following correctly describes seafloor spreading? A. New oceanic crust is formed at midocean ridges, pushed away from the ridge, and destroyed at deep-sea trenches. B.

How to arrange from smallest to biggest organ, organism, gene, nucleus, cells, tissue, chromosome, system?

Tracheids and vessels together make up A. xylem. B. phloem. C. chloroplasts. D. a plant cell.

Which statement is true for single-celled organisms? A. They are often harmless. B. They always cause disease. C. They only live inside humans. D. They reproduce in a complicated process.

If there are 20 centromeres in a cell at anaphase, how many chromosomes are there in each daughter cell following cytokinesis?