Which system produces blood cells?
a. endocrine
b. skeletal
c. muscular
d. defense
e. integumentary
Answer: b
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Humans have a quasi-exponential growth curve because they can do which of the following?
a. Adapt to their current environment quickly. b. Produce many offspring at one time. c. Alter their environment like no other species on Earth. d. Produce offspring rapidly.
Which does not produce variation?
1.crossing over 2.random alignment of chromosomes during meiosis 3.mitosis 4.genetic recombination of alleles 5.sexual reproduction
If an individual's two alleles for a gene are the same, the individual is ______ for that gene.
a) heterozygous b) homozygous c) true-breeding d) Both B and C are correct
Placental transfer tissues are necessary because plant embryos are incapable of photosynthesis.
Answer the following statement true (T) or false (F)