If a scientist observes a polypeptide chain arranged in a spiral turns that rise upward and held in place by hydrogen bonds, what level of structure arrangement are they looking at?

Taste buds Select one: a. can perceive seven basic tastes. b. are replaced approximately every 30 days. c. can only perceive taste if the molecules are in solution. d. can be found covering both the superior and inferior surfaces of the tongue. e.

3. Mammals and birds are able to maintain relatively constant body temperatures. In cold weather, their internal temperatures could be many degrees warmer than the air temperature around them.

Weather maps use isobar lines to show weather conditions. Which of the following information is indicated by these lines? A: high and low-pressure areas B: high and low temp C: precipitation level D: cloud formation

A. What is the density of a book whose mass is 1,800 g and whose volume is 300 cm3

If sister chromatids failed to separate during meiosis ii, what would the resulting gametes look like?

Animals are motile because they have: a. energy b. metabolism c. nerve and muscle fibers d. legs or wings

Radiation generated by the big bang cooled and is now detectable as microwaves. t/f

What's an easy way to remember the definition of biome?

What causes lighting

Urinary system keeps the pH of the blood around