Why do O 2 and CO 2 pass through the plasma membrane?

they are nonpolar and soluble

they are facilitated by protein

they are "pumped" through

they undergo pinocytosis

In the condition called athlete's foot, the fungus Trichophyton consumes the keratin protein found in hair, nails, and dead skin. Which of the following descriptors does not apply to Trichophyton? Select one: a. Parasite b. Heterotroph G C.

A person's phenotype can be best described as:

1. Thyroid hormones exert their effects on cells in a manner similar to steroid hormones; describe the mechanism of action of thyroid hormones.

Urban sprawl covers land once used for food production and destroys ecosystems. a. True b. False By the United States Census Bureau standards, a population of 1,000 people defines an urban area. a. True b. False

Out of hypothesis, theory and law, which occurs before the experiment is complete?

Which substance is used in a sewage treatment system to kill harmful bacteria

Which is a key component of the energy molecule ATP? sodium chlorine sulfur

Which of the following describes vicariance? When the Indian subcontinent slammed into Asia forming the Himalayan Mountains, two populations of oak trees were permanently separated by the mountains.

A patient can't feel his fingers after a hard fall on his arm during a wrestling match. The doctor suspects nerve damage.

Brown fat is a specialized tissue found especially in infants and hibernating mammals. Brown fat mitochondria have proton channels located in their inner membranes that allow protons to flow from the intermembrane space into the mitochondrial matrix