Your friends, who own a large citrus orchard, invited you to have dinner yesterday, and when you arrived, you found they had prepared a veritable feast on their patio. While dining, you discovered that the trees providing shade from the evening sun bore a variety of citrus fruit, including lemons, limes, oranges, and grapefruit – not on separate trees, as you would expect, but rather each of those trees were heavy with two or more types of citrus fruit each. One of your friends, noticing your amazement, laughed and said, “We planted fruit-salad seeds.” Obviously, that’s not the explanation, but how else could they have created their small fruit-salad canopy?
a. Lemons, limes, oranges, and grapefruit are the same fruit grown with exposure to various hormones.
b. Pollen from multiple species are able to cross-fertilize, producing multiple unique fruit on each tree.
c. Citrus trees are closely related, allowing for scions of multiple species to be grafted together.
d. Blending together calluses from related plant species allows for the growth of chimerical plants.
c. Citrus trees are closely related, allowing for scions of multiple species to be grafted together.
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In a lichen, the mycobiont receives
a. nutrients. b. protection from herbivory. c. aid in sexual reproduction. d. enhanced dispersal of offspring. e. shelter from radiation and desiccation.
How do negative regulators such as the Lac repressor prevent RNA polymerase from initiating transcription?
A) by blocking the ribosome binding site B) by forming a loop in the operator that restricts the passage of the polymerase C) by physically blocking the DNA binding site of RNA polymerase D) by binding to the polymerase to inhibit its catalytic activity
Answer the following statements true (T) or false (F)
1.Monogamous animals live with their one mate and help take care of their young. 2.Response to a predator is a type of innate behavior. 3.Behavior displayed in animal reproduction is a type of innate behavior. 4.Imprinting is a type of innate behavior. 5.A chimp using a stick to probe for termites from a nest is evidence of cognition.
Where does translation occur in eukaryotes?
A) In the nucleus only B) Both in the nucleus and in the cytoplasm C) In the cytoplasm only D) In neither the nucleus nor the cytoplasm