Choose the true statements about species that show convergent evolution. Check all that apply.
A. must be found in the same biogeographical region
B. subject to similar selection pressures
C. have similar phenotypes
D. do not share a recent common ancestor
Answer: D
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True or false: Competition can occur over resources such as space, mates, and nesting sites, not just over food
A. true B. false
Answer the following statements true (T) or false (F)
1. Prokaryotic genomes often contain a circular chromosome with hundreds of thousands of genes and highly repetitive DNA. 2. In humans, the genome is made up of 22 autosomes and 1 sex chromosome. 3. Some transposable elements contain a central region that encodes transposase, an enzyme that facilitates the actual transposition. 4. If a researcher determines that 25% of a liver cell's total genome encodes genes for metabolic enzymes, then he/she can conclude that metabolic enzymes make up 25% of the total protein composition of the cell. 5. A nerve cell and a muscle cell taken from the same individual would have two different sets of genes.
Which of the following would occur if excess sweating led to dehydration and high salt concentration in the bloodstream?
A. The hypothalamus would signal the kidneys to release more salt into the urine. B. The hypothalamus would signal the kidneys to absorb more salt from the urine. C. The liver would signal the kidneys to absorb more salt from the urine. D. The liver would signal the kidneys to release more salt from the urine. E. None of the answer choices is correct.
Peroxisomes contain enzymes used to digest nutrients that have been brought into the cell through phagocytosis.
Answer the following statement true (T) or false (F)