Which is one of the seven characteristics that Mendel observed in pea plants? Which is one of the seven characteristics that Mendel observed in pea plants?
A. flower size
B. seed texture
C. leaf shape
D. stem color
Ans: B. seed texture
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What is the function of the acrosome of a sperm cell?
1.Contain enzymes that help the sperm penetrate an egg
2.Contain the DNA
3.Locomotion
4.Produce energy for locomotion
Why does red and blue light support the highest rates of photosynthesis?
a. These wavelengths activate ATP synthase. b. These are the only wavelengths reaching Earth from the sun. c. These are the only wavelengths that carotenoids cannot absorb. d. These wavelengths have the highest energy in the visible spectrum. e. These wavelengths are absorbed by chlorophyll more than any other wavelength.
Portal blood vessels connect two capillary beds found in the _____
A) hypothalamus and thalamus B) anterior pituitary and posterior pituitary C) hypothalamus and anterior pituitary D) posterior pituitary and thyroid gland
In eukaryotes DNA replication proceeds in one direction along the DNA molecule
a. true b. false