In a strawberry plant in the summer, the leaves are ________ and the strawberry fruits are ________
A) sugar sources… sugar sources
B) sugar sources… sugar sinks
C) sugar sinks… sugar sources
D) sugar sinks… sugar sinks
B
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Most dinosaurs died out by the end of the ____ period
a. Triassic b. Jurassic c. Cretaceous d. Quaternary e. Permian
The benthic community of an ocean, with the exception of hydrothermal vents, is best described as
A) completely heterotrophic and very diverse. B) completely autotrophic and very diverse. C) completely phototrophic and not very diverse. D) mostly heterotrophic and not very diverse.
The structure in the eye that focuses light on photoreceptors is the __________
a. cornea b. pupil c. iris d. lens e. ciliary muscle
Associations between plant roots and fungi in which the fungi actually penetrate the outer cells of the plant root are
A. staphylomycorrhizae. B. streptomycorrhizae. C. ectomycorrhizae. D. arbuscular mycorrhizae.