Muscles in animals are often found in pairs, because

a. muscles can only pull.

b. muscles need to be able to both push and pull.

c. muscles can only push.

d. muscles can only produce a force as they relax.

The tendency of a mineral to break along a smooth, flat surface

Which portion of the electrocardiogram represents the time during which the ventricles are in systole?

Which are structures of the excretory system? Check all that apply. kidney spleen bladder liver ureter urethra

What is the correlation between a high body mass index and being prediabetic?

Which of the following mammals can hear the largest range of sound frequency? a. Beluga whale b. Human c. Porpoise d. Bat

Solar flares may be used to predict what?

What do scientists hope to accomplish using recombinant DNA? Ability to prevent infectious disease Replacement of defective genes with normal genes Easy access to medical treatment for individuals with any genetic disease Cheaper medications for

If a climate changed a ecosystem, there would be a change in the kinds of and. that could live in that ecosystem

Match the factors affecting genetic diversity with the examples

The distance covered by a degree of longitude is