Draw and label a long bone, giving the function of each part. What will be an ideal response?
Concepts to Consider: Periosteum--outer connective tissue to which tendons and ligaments attach;
capable of producing bone and increasing diameter. Diaphysis--shaft of long bone; houses marrow
cavity filled with bone marrow. Epiphyses--ends of long bone. Metaphysis--disk of cartilage that
separates diaphysis and epiphyses; growth center, allows for the lengthening of bone. Epiphyseal line
occurs when growth stops.
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There are seemingly conflicting studies that have taken a look at whether Neanderthals interbred with human ancestors. One study of mitochondrial DNA suggests that the two groups did not interbreed
Another study, of the whole genome, suggests that they did. Which of the following could explain these results? A. Taking a look at the whole genome is much more reliable than looking at mitochondrial DNA. B. Mitochondrial DNA is more susceptible to mutations than nuclear DNA so more change would be expected. C. Mitochondrial DNA is passed on the maternal side, so if Neanderthal females did not interbreed with our ancestors, Neanderthal mitochondrial DNA would never have entered the modern human gene pool. D. Genomic DNA is more susceptible to mutations than mitochondrial DNA, so more change we be expected. E. None of the answer options is correct.
Peptide bonds form between ____
a. two amino groups b. two carboxyl groups c. a carboxyl group and an R group d. an amino group and a carboxyl group e. an amino group and an R group
How do biologists define "life"?
What will be an ideal response?
Bacteroids are
a. specialized nitrifying bacteria. b. small buds from ammonifying bacteria. c. specialized bacteria that help some plant roots absorb phosphorus. d. enlarged and immobilized nitrogen-fixing bacteria. e. interactions between plant root hairs and bacteria.