What is the type of diffusion in which water moves down a concentration gradient?
What will be an ideal response?
osmosis
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Based on the morphological species concept, why would you assume that there are many different
species of rat snakes?
What will be an ideal response?Sexual reproduction is important to the survival of a species in a changing environment because
A. sexual reproduction requires less overall energy expenditure than asexual reproduction. B. sexual reproduction produces genetically different individuals. C. sexual reproduction requires only one individual. D. sexual reproduction produces genetically-identical individuals. E. All answers are correct.
In pea plants, the gene for round seeds (R) is dominant, and wrinkled seeds (r) is recessive. The endosperm of the pea is also either starchy, a dominant gene (S), or waxy (s). What can be said of a fully heterozygous, dihybrid cross?
A. Some offspring could be homozygous for both dominant genes. B. Some offspring could be homozygous for one dominant gene such as round seed and homozygous recessive for the other recessive waxy gene. C. Some offspring could be homozygous for both recessive genes. D. All of these choices are impossible combinations in a dihybrid cross. E. All of these choices are possible combinations in a dihybrid cross.
Which of these cell types can be described as muscle cells that contract rapidly, are rich in glycogen deposits, and depend on anaerobic respiration to produce ATP?
A) slow-twitch cells B) myoglobin C) fast-twitch cells D) hemoglobin