The type of chemical bond that holds together adenine and thymine in the middle of a DNA molecule is a(n) ________________ bond
Fill in the blank(s) with correct word
hydrogen
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Monocots are
A. flowering plants. B. mostly herbaceous. C. have one seedleaf (cotyledon). D. All of the above are correct.
Thalidomide is a chemical that was prescribed as a sedative in the early 1960s. Many women who took the drug during their first trimester gave birth to children with arm and leg deformities. What developmental process did this drug affect?
A) early cleavage divisions B) determination of the polarity of the zygote C) differentiation of bone tissue D) morphogenesis E) organogenesis
Why are membrane-bounded organelles able to facilitate faster chemical reactions?
a. Membranes are permeable to all solutes and their enzymes. b. Enzymes are organized close together on the membrane surface. c. Membranes lower the activation energy of biochemical reactions. d. Membrane-bounded organelles act as catalysts for biochemical reactions. e. Enzymes are more readily available within membrane-bounded organelles
The fovea of the human eye
A) is also known as the blind spot. B) is located in the sclera. C) contains a high concentration of ommatidia. D) is the part of the retina that produces the sharpest image. E) contains mostly rods.