Apoptosis can be described as
A) programmed cell death.
B) gastrulation.
C) phagocytosis.
D) neural tube formation.
Answer: A
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Optical tweezers can be used to ________.
A. remove structures from the surface of cells B. study nucleic acids recovered from individual cells C. help dissect individual microorganisms D. All of the choices are correct.
What is the key concept addressed by the question?
What will be an ideal response?
The physical movement of alleles between populations is known as ____
a. natural selection b. genetic drift
c. gene flow d. inheritance e. mutations
Hagfish (Eptatretus cirrhauts) are a jawless marine vertebrate that are isotonic with their environment and are considered to be osmoconformers. How might this interesting adaptation limit the habitat that the hagfish can tolerate?
A) Hagfish are not limited by salinity. B) Osmoconformers do not face the same pressures as osmoregulators and can live in any marine environment. C) Individual hagfish will adapt to different salinities over their lifetime and, therefore, can inhabit any marine environment. D) Hagfish habitat is limited by the salinity of the environment.