Chromatids are ____________________.
A. attached at the centriole.
B. a pair of chromosomes, one from the mother and one from the father
C. attached to the nuclear envelope
D. identical before and after crossing over occurs.
E. identical until crossing over occurs
Answer: E
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Fill in the blank(s) with the appropriate word(s).
An alien from another planet landed on earth. He is fascinated by cars and is determined to figure out how they work. He decides to disassemble one of them and examine each part independently. He removes one of the tires and proceeds to learn all he can about the tire. He then removes one of the headlights and proceeds to learn all he can about the headlight. What type of approach is this alien taking to learn about the car?
A. reductionism B. Emergent properties C. inductive reasoning D. deductive reasoning
_____ have a deep layer of humus-rish topsoil
a. Deserts c. Rain forests b. Grasslands d. Seamounts
_____ refers to the process by which microbes gain a more stable foothold at the portal of entry though interaction of their molecules with host cell receptors.
Fill in the blank(s) with the appropriate word(s).