Gravity-sensing mechanisms of many
organisms are based on
a. spicules.
b. statoliths.
c. uric acid crystals.
d. sclereids.
e. nematocysts
B
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Approximately how many times more gametes are found in a single male ejaculation compared to all the eggs found in a female at puberty?
A) 625 times B) 20 times C) 20,000 times D) 1,000,000 times
For the study of a protein in detail, an effort is usually made to first:
A) conjugate the protein to a known molecule. B) determine its amino acid composition. C) determine its amino acid sequence. D) determine its molecular weight. E) purify the protein.
Which of the following is a serious concern when performing PCR?
A. Restriction enzymes are difficult to obtain in adequate quantities. B. The high temperature needed may denature the DNA. C. Lab personnel may be exposed to radiation. D. PCR is a very time-consuming process. E. Contaminating DNA may be introduced and amplified.
Match the protist with the supergroup it belongs in
Trichomonas A) Amoebozoa B) Excavata C) Chromalveolata D) Archaeplastida