Orchids, which grow well in regions that are hot and dry during the day and cool at night, are classified as CAM
plants.
a. True
b. False
ANSWER: True
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How does habitat fragmentation affect biodiversity?
a. As long as the fragments are of good quality habitat, biodiversity will not be affected. b. Habitat fragmentation increases biodiversity because it reduces entry of exotic species. c. Habitat fragmentation is a threat to biodiversity because small habitat patches sustain only small populations. d. Habitat fragmentation increases biodiversity because adaptation to local conditions stimulates evolution. e. Habitat fragmentation connects terrestrial and aquatic habitats.
Which of the following is a reason that pollinators ARE considered keystone species?
a. many plant species rely on insects to successfully reproduce b. pollinators maintain the integrity and productivity of natural communities c. pollinators are a critical link in the food chain d. pollinators have complex social structures and division of labor e. pollinators are not considered to be keystone species
Explain why individuals with type O blood can donate to any other blood type, and why individuals with type AB
blood can accept blood of any blood type. What will be an ideal response?
In bacterial ribosomes, a small 30S subunit and a large 50S subunit come together to produce the functional 70S ribosome. Why isn't it an 80S ribosome?
A) The ribosome will become an 80S complex when the protein it is producing starts to be formed. B) Additional factors are required for protein synthesis. When these are put with the ribosome, it will become an 80S ribosome complex. C) S stands for Svedberg units, which indicates the relative rate of sedimentation due to size, weight, and shape of a particle. The numbers aren't strictly additive. D) A portion of the larger 50S subunit is detached as the ribosomes come together,making the final complex a 70S ribosome instead of an 80S ribosome.