A(n) adventitious root is one that occurs in an unusual location. Indicate whether the statement is true or false
True
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Which of the following statements correctly describes some aspect of protein secretion from prokaryotic cells?
A) Prokaryotes cannot secrete proteins because they lack an endomembrane system. B) The mechanism of protein secretion in prokaryotes is probably the same as that in eukaryotes. C) Proteins secreted by prokaryotes are synthesized on ribosomes bound to the cytoplasmic surface of the plasma membrane. D) Prokaryotes cannot secrete proteins because they lack ribosomes.
Although Americans make up less than 5% of the total human population, what percentage of the world's resources do Americans generally use?
A) 51% B) 24% C) 73% D) 82%
Weak attractions between adjacent water molecules are
A) ionic bonds B) van der waals forces C) hydrophobic interactions D) polar covalent bonds E) hydrogen bonds
All members of the golden hamster species known today are descendants of a single litter collected in Syria in 1939. Its diploid chromosome number is 44. Two other species of hamster, each with a diploid number of 22, overlap geographically in Syria
The golden hamster is thought to be a new species from the mating of a male and female of the two other hamster species. What mechanism might explain this recent event of speciation? A) Polyploidy B) Adaptive radiation C) Formation of a fertile hybrid and halving of the chromosome number of this hybrid D) Disruptive selection E) Temporal isolation