Boiling is not reliable for sterilization because
A.
heat-sensitive instruments may be destroyed.
B.
heat-resistant endospores are unaffected.
C. water boils at a higher temperature at lower altitudes.
D. viruses are more sensitive to heat than bacteria.
B
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You are given an embryo with eight cells and you carefully separate them and allow them to develop in separate containers. Each of the cells forms a complete embryo that develops normally into an adult animal. How would you categorize your animal?
A. It has indeterminate cleavage. B. It has determinate cleavage. C. It is a protostome. D. It is an annelid, mollusk, or arthropod. E. It has spiral cleavage.
The home range of an animal is always defended
Indicate whether the statement is true or false
Which of the following are exceptions to the universal genetic code that is used by most organisms?
A. Pyrrolysine B. Selenocysteine C. Lysine D. Phenylalanine E. Stop
Which of the two viral phylogenies below shows the signature of a recent rapid population expansion? Justify your answer in one or two sentences
What will be an ideal response?