Eukaryotic cell mRNA transcripts can remain in the cell for hours because they are
A. stable.
B. long.
C. isolated.
D. analogous.
A. stable.
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Discuss the ethical issues – both for and against – associated with PGD selection of savior babies
What will be an ideal response?
Closely related plant species that attract different pollinators resulting in reproductive isolation is an example of
A. sympatric speciation. B. allopatric speciation. C. hybrid inviability. D. hybrid infertility. E. hybrid breakdown.
An evolutionary tree depicts species' relationships based on descent from shared ancestors.
a. true b. false
As electrons move along the electron transport chain, they lose potential energy. How is the energy that is released used by the cell?
A. The energy is used to transport protons against their concentration gradient. B. The energy is used to pump NAD+ into the cytoplasm so it can be used in glycolysis. C. The energy is converted directly into ATP. D. The energy is used to pump electrons along the electron transport chain.