Inside the human body, the mitochondria ________ .
a. help to assemble amino acids into proteins
b. function as a constituent part of cell membranes
c. house enzymes that are involved in the process of energy metabolism
d. are located outside the cytoplasm
e. are located in the nucleus
Answer: c. house enzymes that are involved in the process of energy metabolism
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A P. bursaria cell that has lost its zoochlorellae is said to be aposymbiotic
It might be able to replenish its contingent of zoochlorellae by ingesting them without subsequently digesting them. Which of the following situations would be most favorable to the reestablishment of resident zoochlorellae, assuming compatible Chlorella are present in P. bursaria's habitat? A) abundant light, no bacterial prey B) abundant light, abundant bacterial prey C) no light, no bacterial prey D) no light, abundant bacterial prey
Four of the five answers listed below are related by a common source. Select the exception
a. calcitonin b. sex hormones c. cortisol d. epinephrine e. aldosterone
Cortisol and aldosterone are secreted by the ________
Fill in the blank(s) with correct word
Answer the following questions true (T) or false (F)
1. Cleavage and gastrulation take place in animals such as humans and birds but not in frogs. 2. Early vertebrate embryos share a general similarity in shape in the period following somite development. 3. Cells first arrange themselves into layers during organogenesis.