Peptide bonds
A) are used to form amino acids.
B) form between fatty acids.
C) are formed by a hydrolysis reaction.
D) link amino acids.
Answer: D
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Which of the following is normally treated by antifungal creams and solutions?
A. Subcutaneous mycoses B. Systemic mycoses C. Superficial mycoses D. Intramuscular mycoses
Jan Baptista van Helmont did an important experiment related to photosynthesis. He weighed a small willow tree and a pot of soil. Jan then planted the tree in the pot. Over the course of five years, he added only water to the pot. At the end of five years, he weighed the tree and found that it had gained 74.4 kg. He weighed the soil, and it was only 57 g less. What do the results of this specific experiment demonstrate about what is needed for a plant to grow and increase its mass?
A. Plants must be able to increase their mass using substances in addition to what is found in soil B. Plants do not need soil to grow C. All of the food a plant needs to grow comes from the water D. All of the food a plant needs to grow comes from the soil E. Plants need oxygen to grow
One of the risks of low crop diversity is that there is a greater risk of famine should the crop exposed to disease. An example is the failure of the ___ crop in Ireland for several years in the mid-1800's.
a) corn b) potato c) rice d) wheat
The human embryo's first blood cells arise in the
A) developing liver. B) developing bone marrow. C) yolk sac. D) allantois.