As populations approach carrying capacity, crowding can affect:
A. birth rates through resource limitation.
B. death rates through resource limitation.
C. death rates by increasing the transmission
of pathogens and parasites.
D. birth and death rates through resource
limitation.
E. birth and death rates through resource
limitation, and death rates by increasing the
transmission of pathogens and parasites.
E
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This hemorrhagic fever causes disease in humans and nonhuman primates such as chimpanzees, gorillas, and monkeys. It is identified in the laboratory using which type of assay?
a. Immunodiffusion b. Peptide nucleic acid fluorescence in situ hybridization (PNA-FISH) c. Transcription-mediated amplification (TMA) d. Reverse-transcriptase polymerase chain reaction (PCR)
When cloning DNA into bacteria,
a. the DNA sequence is inserted into a plasmid. b. the DNA sequence is inserted into the bacterial chromosome. c. the linear DNA sequence is circularized, thus generating a plasmid. d. the new DNA is directly introduced into the bacterial cell. e. either the approach in b or c is used; the choice depends on the type of bacteria.
The anterior pituitary secretions produce their effects
in a. the gonads. b. the thyroid gland. c. the adrenal gland. d. the mammary glands. e. all of these.
What is the name of the tube through which urine leaves the urinary bladder?
a. renal vein b. collecting duct c. urethra d. renal pelvis