Which life history patterns in some rotifers are adapted to living in small bodies of water?
What will be an ideal response?
ANSWER: Since small bodies of water are susceptible to drying periods and freezing, rotifers' ability
to reproduce asexually through parthenogenesis in different ways in different conditions is
adaptive. During most months, females produce diploid females. But when environmental
conditions deteriorate, females produce haploid males that fertilize haploid eggs to produce
diploid female zygotes. These fertilized eggs have durable shells and food reserves that
allow them to survive drying or freezing.
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The snottites described in the case study at the beginning of this section are colonies of bacteria, extremophiles that have some unique requirements for life processes
For example, they use sulfur from the hydrogen sulfide in the environment to capture energy. Although most life forms you are familiar with, including humans, don't use sulfur for this purpose, we do use another element to do the same thing. Which element do humans use for this energy conversion? Carefully examine the periodic table. A. carbon B. nitrogen C. hydrogen D. oxygen
Gene regulation during development is _____, which means that _____
A. restrictive; genes are successively lost over time B. restrictive; genes lose developmental potential over time C. hierarchical; genes expressed at each stage control the expression of genes that act later D. hierarchical; genes are turned on in a specific sequence, starting with totipotent and ending with multipotent E. combinatorial; genes expressed at each stage control the expression of genes that act later
In horses, black coat color is influenced by the
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Insight learning will help
A. a wolf learn imprinting. B. protect an insect from being eaten by a bird. C. teach a bird how to fly. D. you select the correct answers on this exam.