In photosynthesis C3, plants differ from C4 plants in
A. the way they capture light.
B. the way they capture carbon dioxide.
C. the kind of chlorophylls they have.
D. None of the choices is correct.
B. the way they capture carbon dioxide.
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Genetic studies of an animal show that eye color is controlled by an autosomal gene with the dominant allele (R) for red
eye color and the recessive allele (r) for yellow eye color. A second autosomal gene has the dominant allele (T) for paws with thumbs and the recessive allele (t) for paws without thumbs. The genetic cross RRTT x rrtt creates offspring with genotype RrTt. One of those dihybrids is mated in a testcross (RrTt x rrtt). Based on the principle of independent assortment, the testcross should produce offspring with the phenotype ratio ____.
a. 3 red-eyed with thumbs : 1 yellow-eyed without thumbs b. 1 red-eyed with thumbs : 1 yellow-eyed with thumbs: 1 red-eyed without thumbs: 1 yellow-eyed without thumbs c. 1 red-eyed with thumbs : 1 yellow-eyed without thumbs d. 9 red-eyed with thumbs : 3 yellow-eyed with thumbs: 3 red-eyed without thumbs: 1 yellow-eyed without thumbs e. 3 yellow-eyed with thumbs : 1 red-eyed without thumbs
Which of the following is NOT true of ecosystems?
a. Although they may include many different species, many features of ecosystem structure and function are alike. b. Autotrophs secure energy and nutrients that are then used by heterotrophs. c. Energy cycles and minerals flow through ecosystems. d. Many different food chains are represented in most ecosystems. e. Ecosystems are characterized by relatively few trophic levels
The experiments conducted by John T. Needham using infusions were interpreted as supporting the theory of
A) antisepsis. B) bioremediation. C) spontaneous generation. D) etiology. E) chemotherapy.
Name two forms of antagonistic coevolution
What will be an ideal response?