Which is not a typical characteristic of monocots?
a. Pollen grains have three pores or furrows
b. Leaf veins are arranged in a parallel array.
c. Floral parts are found in multiples of three.
d. Seeds have only one cotyledon.
a
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Coloration in the peppered moth (Biston betularia) is determined by a single gene with two alleles showing complete dominance. Dark moths are homozygous dominant or heterozygous for the gene, light moths are homozygous recessive. In a sample of 100 moths, you determine that 64 of the moths are dark. According to the Hardy-Weinberg rule, the expected frequency of the dominant allele is ___.
A. 0.4 B. 0.36 C. 0.6 D. 0.64 E. cannot be determined Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about the Hardy-Weinberg principle? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
In what type of environment would you expect to find a plant that spends most of its resources on defenses, rather than growth? Select all correct choices
A. in the nutrient-poor soil of a tundra B. in the clay soil of a rainforest C. on well-fertilized farmland D. in the sandy soil of a rainforest
The production of pollen, seeds, and flowers attributed to the widespread distribution of angiosperms. Why is the production of pollen an advantage?
A. It allows fertilization in the absence of water. B. It allows fertilization in moist areas. C. It promotes pollination. D. It is necessary for sexual reproduction. E. It protects and nourishes the embryo.
The figure below shows a normal cell transduction pathway. If the receptor weren't there, which of the following is the most likely outcome?
A) Cell division will occur normally.
B) Cell division will not occur at all.
C) Cell division will be increased.
D) Cell division will be decreased.