The distinguishing characteristic used to classify the algae into four kingdoms is
A) whether they are single celled or multicellular.
B) their cell wall components.
C) their storage products.
D) their habitat.
E) presence or absence of chlorophyll a.
C
You might also like to view...
During elongation, RNA polymerase has three prominent channels, or grooves. These channels provide sites for all of the following EXCEPT _____
A) a site for the double-stranded DNA molecule B) a site for the entry of ribonucleoside triphosphates C) a site for the exit of the diphosphates removed from the nucleotide triphosphates D) a site for the growing RNA strand
The hydroxyapatite that makes up the bulk of the bony endoskeleton of vertebrates is found in:
A. osteocytes. B. the extracellular matrix of osteocytes. C. the collagen. D. osteoblasts.
The property of water that helps cool our skin
when we sweat is
a. cohesion. b. evaporation. c. temperature stabilization. d. lattice packing. e. solvent power
Which statement best explains why modern Europeans, Asians, or Africans lack Denisovan DNA in their genome?
A. Denisovans never interbred with any population of Homo sapiens. B. Denisovans DNA was eliminated from those populations by strong purifying selection. C. Denisovans interbred only with the population whose ancestors are Melanesians. D. Neanderthal genes and Denisovan genes are incompatible, so modern populations have one or the other. E. Denisovans are an offshoot of hominins that are unrelated to modern humans.