food moves down the esphagus under the influence of gravity alone.
a. true
b. false
b. false
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On reaching the oocyte, a human sperm cell must pass through what layer(s) before it can fuse with the plasma membrane of the egg?
What will be an ideal response?
Although Dolly was only three years old, her chromosomes had the length of a 9-10 year old sheep. Which of the following best describes why this occurred?
A. The cell lines that created Dolly were aged prematurely in the lab B. Nonhomologous recombination C. A mutation enhanced the rate of aging D. Dolly was not a clone E. The telomeres of the somatic cells that Dolly originated from were shortening
If it were found that all animals except the Parazoa had a particular set of genes, one could conclude
A. that those genes are not useful in interpreting phylogeny. B. that Darwin was incorrect in his idea about descent with modification. C. that the Parazoa are not animals. D. that those genes probably are related to the embryonic formation of tissues. E. that those genes are related to cell wall formation.
Following a very large meal that was loaded with carbohydrates, how does the human body to respond to the excess sugars being absorbed into the bloodstream?
What will be an ideal response?