The function of the phloem companion cells is to
a. assist vessel members to move organic
substances.
b. supply potassium ions for water absorption.
c. help load organic compounds into neighboring
sieve tubes.
d. store the organic compounds transported by the
sieve tubes.
e. help transport organic compounds when the
sieve tubes become overloaded.
Answer: c
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Recall that eukaryotes consist of remarkably different organisms. For instance, compare a squid living in the ocean and a squirrel in your back yard. These two animals have different limbs, different mouths, and different skins
Why are these two animals so morphologically different? Select all that apply. A. These two animals use very different biochemical pathways for respiration. B. These two animals are specialized for different environments and food sources. C. These two animals use very different biochemical pathways for photosynthesis.
Stem cells that can differentiate into any type of tissue but cannot differentiate into a complete organism are ______________ cells
A. totipotent B. pluripotent C. unipotent D. None of the choices is correct.
Assembly of the T4 phage
A. may involve some self-assembly. B. may involve the use of scaffolds. C. is completely self-assembly. D. is completely dependent on scaffolds. E. may involve some self-assembly AND may involve the use of scaffolds.
Unlike terrestrial plants, submerged aquatic plants lack
A) leaves. B) chlorophyll. C) stomata. D) stems.