Very high concentrations of ____ accumulates in large predatory fishes such as swordfish, bluefin tuna, and albacore
tuna, which may cause developmental abnormalities when consumed by pregnant women.
a. methylmercury
b. DDT
c. sulfur dioxide
d. chlorofluorocarbon (CFC)
e. ozone gas
ANSWER: a
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Answer the following statements true (T) or false (F)
1. The cell is the basic structural/functional unit common to all living organisms. 2. Resolution, contrast, and magnification are three important parameters in microscopy. 3. Fluorescence microscopy enables researchers to label and visualize a particular type of cellular protein or organelle. 4. The flagellum is used for cell motility in eukaryotes only.
The codon encoding the amino acid methionine functions as a start codon when it occurs at the beginning of a gene
a. True b. False Indicate whether the statement is true or false
Reproduction in glomeromycetes is typically ____ via spores that form ____
a. sexual; in sporangia b. asexual; at the tips of hyphae c. sexual; at the tips of hyphae d. asexual; in sporangia e. asexual; both in sporangia and at the tips of hyphae
The cardiac pacemaker is the
a. sinoatrial node. b. atrioventricular node. c. pulmonary node. d. aortic node. e. sinoventricular node