The tiny air sacs of the lungs are called:
A) bronchioles. B) trachea. C) bronchi. D) alveoli.
Answer: D
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Sperm cells and egg cells (oocytes) are called
A) grommets. B) marmites. C) gametes. D) gonads.
Membrane sterols such as cholesterol function in animal cell membranes to ____
a. increase the rate of diffusion b. store cellular energy c. facilitate ion transport d. maintain membrane fluidity e. receive chemical signals
Which of the following organisms is
responsible for the production of cheese, yogurt, and sour cream?
a. Lactobacillus b. Saccrharomyces c. Clostridium d. E. coli e. more than one of these
Following their respective breeding seasons, several species of hummingbirds occur at the same locations in North America and several hummingbird flowers bloom simultaneously in these habitats. These flowers seem to have converged to a common morphology and color. Birds are most visually sensitive to the color red. Hummingbird flowers are pollinated by hummingbirds. Which of the following features of these flowers would indicate they have coevolved with hummingbirds? (Check all that apply.)A) Long tubular flowersB) Flowers are colored violet and blueC) Blooming time of the flowers coincides with the arrival of the hummingbirdsD) Flowers produce a high volume of nectar and sugarE) Flowers are low to the ground
What will be an ideal response?