In a population that meets the Hardy-Weinberg equilibrium assumptions, 81 percent of the individuals are homozygous for a recessive allele
What percentage of the individuals would be expected to be heterozygous for this locus in the next generation?
18 percent
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Why is colony collapse disorder (CCD) a problem for all of us?
a. the pathogen responsible for CCD can infect multiple hosts b. the decline in honey production could cause our economy to collapse c. bees are essential as key pollinators of our agricultural crops d. actually, it’s not-- there are other pollinators that can take over for the bees e. bees could spread this disease to humans through their honey
The same gene that causes various coat patterns in wild and domesticated cats also causes the cross -eyed condition in these cats, the cross-eyed condition being slightly maladaptive. In a hypothetical environment, the coat pattern that is associated with crossed eyes is highly adaptive, with the result that both the coat pattern and the cross-eyed condition increase in a feline population over time. Which statement is supported by these observations?
A) Evolution is progressive and tends toward a more perfect population. B) Phenotype is often the result of compromise. C) Natural selection reduces the frequency of maladaptive genes in populations over the course of time. D) Polygenic inheritance is generally maladaptive, and should become less common in future generations. E) In all environments, coat pattern is a more important survival factor than is eye-muscle tone.
Glycosaminoglycans and proteoglycans resist compression and are found in large abundance in joints of the body.
Answer the following statement true (T) or false (F)
How do oxygen molecules travel through a cell membrane?
A) diffusion B) active transport C) carrier proteins D) endocytosis