Sometimes plants produce embryos in seeds without meiosis and fusion of gametes. This process is known as:
a. coevolution.
b. apomixis.
c. self-pollination.
d. mitosis.
e. suckering.
b
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Characterize hemoglobin
What will be an ideal response?
The _____ drains the upper part of the body
a. right lymphatic duct b. spleen c. tonsils d. thoracic duct e. lymphocyte duct
In which blood vessels do the exchange of gases and other materials occur?
A) arteries B) veins C) capillaries D) right atrium
Any blastomere removed from an eight-cell mammalian embryo can develop into a normal late-stage embryo. This finding supports the idea that
A) only the zygote is totipotent. B) the progressive restriction of potency hypothesis applies. C) the first cleavage event must be transverse to the animal-vegetal axis of the zygote. D) cell divisions producing the earliest blastomeres do not result in an asymmetrical distribution of cytoplasmic determinants. E) there is no organizer in mammals.