A collection of tiny organisms that drift and swim in lakes and seas and include both heterotrophs and autotrophs are knows as ___________.
A. excavates
B. metamonads
C. plankton
D. trypanosomes
E. phytonomads
Answer: C
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If 16% of the nucleotides in one strand of a DNA molecule contain the base G, what percent of the nucleotides on the complementary strand will also contain the base G?
A. 16% B. 8% C. 34% D. 32% E. Impossible to determine from the information given. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain? Gather Content · What do you already know about base pairing in DNA? 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?
Choose from the following terms to fill in the blanks in the correct order
A. ligand B. signaling cell C. receptor D. responding cell In communication between cells, the _____________________ produces the signaling molecule, also known as the ________________; the ______________________ produces the _______________, to which the signaling molecule binds. A. B, A, D, C B. A, B, C, D C. B, C, A, D D. D, C, B, A
With respect to RNA processing, which of the following is false?
A) It leads to the production of alternative gene products. B) Some introns are removed by spliceosomes. C) Some introns are self-splicing. D) Prokaryotic mRNAs are polyadenylated at the 3' end. E) Chemical modification occurs with tRNA transcripts.
What stage of development involves cell division without cell growth?
A. gastrulation B. organogenesis C. fertilization D. cleavage E. neurulation