Honeybee workers spend their first few weeks as young adults tending the colony's brood, then later shift jobs to foraging for food outside the colony
When researchers fed the young
bees candy spiked with the molecule ethyl oleate, the young bees continued to babysit and
delayed the job shift to foraging. What would it require to demonstrate that ethyl oleate
normally acts as a pheromone, not as an endocrine or paracrine signal?
A. It would require demonstration that ethyl
oleate binds to a receptor and initiates a
series of responses.
B. It would require demonstration that ethyl
oleate is released by another individual of the
same species.
C. It would require demonstration that ethyl
oleate is released by a predator and causes a
behavioral change in the prey.
B
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Photosynthesis occurs in _____, while respiration occurs in _____
a. plants, animals d. plants, plants and animals b. animals, plants e. plants and animals, plants and animals c. plants and animals, animals
Which organelle is enclosed by a double membrane?
a. ribosome b. nucleus c. lysosome d. peroxisome e. Golgi body
Why do some Basidiomycetes form a ring like organization, as observed on the top of soil?
a. They deplete the soil of magnesium. b. They deplete the soil of oxygen. c. They deplete the soil of nitrogen. d. They deplete the soil of potassium.
Equilibrium theories of species diversity have been applied to islands and to larger, continental regions. Which of the following processes is likely to play a greater role in the determination of equilibrium diversity in a continental region?
A) extinction of species B) immigration of species from elsewhere C) formation of new species