One of the problems associated with assisted reproduction is that ____
a. technology for effective gamete freezing has not been developed
b. the techniques for intrauterine implantation have not been fully explored
c. deleterious recessive alleles can be passed on to offspring
d. sperm cannot live outside the human body
e. the potential harm to the mother is largely unknown
ANSWER: c
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The distinctive feature of chloroplasts is that they contain a green pigment called:
A. Gram stain. B. chlorophyll. C. hemoglobin. D. chromatin. E. keratin.
Most microorganisms are pathogenic
Indicate whether the statement is true or false.
Which of the following observations supports the endosymbiotic theory for mitochondria? a. Mitochondria divide independently of nuclear division
b. All of the choices. c. Mitochondria have their own DNA. d. Membranes within mitochondria resemble plasma membranes of bacteria.
For many decades scientist thought that proteins were the genetic material
a. true b. false