Accessory photosynthetic pigments are important because:
a. they can capture different light wavelengths.
b. they enable chromatic adaptation with depth and seasons.
c. they shield the cell against damaging wavelengths.
d. all the above.
D
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Which of the following statements about homologous chromosomes is false?
1.One member of a homologous pair is inherited from the mother and the other is inherited from the father. 2.Homologues have identical gene loci but may carry differing alleles. 3.Sister chromatids separate in Meiosis I and homologous chromosomes separate in Meiosis II. 4.During meiosis I, chromatids of each homologous pair often exchange segments by crossing over. 5.None of the choices
The International Union for Conservation of Nature and Natural Resources (IUCN) reports that of the 48,677 species
they have assessed, ____ percent were threatened or endangered. a. 8 b. 18 c. 27 d. 36 e. 65
What are the downsides of sweat as a cooling mechanism? What will be an ideal response?
Conventional wisdom holds that oxpeckers remove ticks from the backs of cattle on which they feed in a mutualistic relationship, and the cattle tolerate the oxpecker's presence because the birds help remove parasites
Weeks (2000 ) performed observational experiments in Zimbabwe and demonstrated that the relationship between oxpeckers and cattle was not the removal of parasites but that the oxpeckers are ________. A) mutualistic, but serve only to remove earwax from the cattle on which they feed B) in fact parasitic, and create and feed on wounds they make, and also feed on earwax in the cattle C) mutualistic and only feed on open wounds that have already been created by feeding ticks D) parasitic and feed on earwax and the open wounds they create during the removal of the earwax E) mutualistic and feed on open wounds that have already been created by ticks, and additionally feed on earwax