What do muscle cells have that other cell types do not?

Which of the following is not a factor that describes weather? A) precipitation b) sky conditions c) temperature d) elevation

Why is the term "food web" more appropriate than "food chain" in referring to the energy relationships among the species of a community?

What unit do we measure the mass of atoms in? Grams (g) Grams (G) Atomic Mass Units (amu) Liters (L)

Which is a defining trait of a mineral? A. dull B. indefinite shape C. inorganic D. made of sulfur

Peripheral membrane proteins (select one): A) penetrate deeply into the lipid bilayer. B) are usually denatured when released from membranes. C) can be released from membranes only by detergent treatment.

Where does food go after it leaves the small intestine?

How does the Sun contribute to physical weathering? A. When water is heated, it expands, which causes rocks to break. B. Minerals in rocks heat and expand at different rates, which causes rocks to break. C.

A phylogenetic tree shows that birds and crocodiles share many features. A hypothesis based on this tree predicts that these features are present in a common ancestor. Which of these predicted traits is supported by fossil evidence?

Imagine that you are talking with one of your friends about your biology course. He states that the somatic nervous system is subdivided into sympathetic and parasympathetic components, and is responsible for involuntary responses.

In both American cotton (Gossypium hirsutum) and Egyptian cotton (G. barbadense) petal spot is a dominant character over no petal spot.