Epigenetic changes
A) pass from one cell generation to the next but do not alter the DNA sequence.
B) do not pass from one cell generation to the next but do alter the DNA sequence.
C) irreversibly alter the DNA sequence and are only passed to the next cell generation if they add an advantage.
D) alter the RNA codon, which are amino acid assignments of the genetic code.
A) pass from one cell generation to the next but do not alter the DNA sequence.
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Are bat wings and bird wings homologous or homoplastic structures?
_____ As examples of vertebrate forelimbs, they are homologous, but as wings they are homoplastic. _____ As examples of vertebrate forelimbs, they are homoplastic, but as wings they are homologous. _____ As vertebrate forelimbs and as wings, they are homologous. _____ As vertebrate forelimbs and as wings, they are homoplastic. 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 homology? 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?
Antibodies are classified in the group of chemicals known as
a. immunoglobulins. b. complement. c. antigens. d. histamines. e. cyclins.
The cell walls of plant cells that have stopped
growing and actively dividing are characterized by the presence of a. pectin. b. cellulose. c. glue-like polysaccharides. d. lignin. e. a gluey matrix containing rope-like strands.
Which step of the photosynthesis pathway produces a carbohydrate from CO2 in the atmosphere?
A. the light reactions B. ATP production C. the Calvin cycle D. the C4 pathway