Two characteristics used to define mammals include

a. mammary glands and scales.

b. mammary glands and hair or fur.

c. mammary glands and sweat glands.

d. sweat glands and a four-chamber heart.

Definition: This is a warning of the planet due to carbon dioxide and heat retention. Example: caused by ozone depletion

An igneous rock that contains many non-ferromagnesian silicate minerals has which composition?

Plant spores are usually Select one: a. haploid b. triploid (3n) c. tetraploid (4n) d. dilpoid (2n)

What type of transport system is used by a blue jay

Glucose, fructose, and ribose are examples of

What two rules are necessary to have a stable atom?

Prairie dogs are an example of A. an abiotic factor B. a producer C. a Keystone species

Ion channel gates close the pores of some ion channels in response to Select one: a. a change in electrical charge. b. stretching of the cell membrane. c. the binding of specific molecules to the channel. d. All of the above

Where would you find hydrogen bonds in proteins?

Of all the animals in the animal kingdom which one (s) would have the best chance for survival in mountains?