Organism that cannot synthesize needed organic compounds from inorganic substances and therefore must take in organic food.
What will be an ideal response?
heterotroph
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Why is it advantageous for organisms not to be consciously aware of all the activity in their nervous systems?
What will be an ideal response?
The long snout of the giant anteater, Myrmecophaga tridactyla, of South America, and the echidna, Tachyglossus aculeatus, of Australia, are animals of different evolutionary lineages that are both adapted to eating ants. This is an example of
A. selective breeding. B. anatomical homology. C. analogous traits. D. artificial selection. E. Both analogous traits and artificial selection are correct.
A bean pod is
a. a seed container. b. a fruit. c. a part of the stamen. d. both a and b.
Repressible genes are usually actively transcribed when:a
repressor molecules bind to the promoter. b. the end product of the enzymes encoded by these genes is low. c. tryptophan accumulates in the cell. d. quantities of precursor materials are high. e. there is no other substrate that can be used by the cell.