Which of these is a form of assisted reproductive technology in which a sperm cell is injected directly into an egg?
a. FSH
b. IVF
c. ICSI
d. IUD
c. ICSI
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Why are mycorrhizal fungi superior to plants at acquiring mineral nutrition from the soil?
A) Hyphae are one hundred to one thousand times larger than plant roots. B) Hyphae have a smaller surface-area-to-volume ratio than do the hairs on a plant root. C) Mycelia are able to grow in the direction of food. D) Fungi secrete extracellular enzymes that can break down large molecules.
Which is not true of viruses?
A. They can exist in an intracellular or extracellular phase. B. They infect animal and plant cells only. C. They are acellular. D. They can be observed with an electron microscope. E. They replicate only inside host cells.
Proteins that function in the cytosol are synthesized ____
a. on free ribosomes in the cytosol b. on the rough ER before being transported to the cytosol c. in the Golgi apparatus d. on the rough ER before being transported to the Golgi apparatus e. in the nucleus before being transported to the cytosol
You are riding on your bike and stop pedaling, coasting along the road. Eventually, your bike slows down and stops. What happened to the energy of your motion when your bike stopped?
A) It was returned to the bicycle. B) It was converted back to chemical energy. C) It was released as heat. D) It was used to chemically break down the tires.