The first organisms
a. had to be aerobic.
b. were pathogenic.
c. had to be anaerobic.
d. were heterotrophs.
e. were multi-celled
C
You might also like to view...
Which statement best reflects the current understanding of pollen-tube elongation?
a. It is not even known if pollen tube growth uses chemical signals or is completely random. b. Pollen-tube elongation will occur as long as the pistil provides moisture and energy. c. While it is known that chemical cues from female tissues help guide pollen tube growth, the identity of these chemicals is not known. d. Nearly all of the details of the chemical interactions between the pollen tube and pistil tissue are known. e. Pollen-tube elongation will occur only when pistil chemical cues are suppressed.
The relationship between species richness and recovery from natural disturbances can best be
summarized as follows:
a. communities with more diversity do not recover from natural disturbances. b. communities with more diversity experience more natural disturbances. c. communities with more diversity recover less rapidly from natural disturbances. d. communities with more diversity recover more rapidly from natural disturbances. e. there is no correlation between community diversity and recovery from natural disturbances.
A toxic material that has the potential to accumulate in the fat tissue of animals is accidentally released into an ecosystem. Plants and animals in this system include red-tailed hawks, mice, corn, and weasels. Arrange the organisms in order according to the level of toxins that they would be expected to accumulate
What will be an ideal response?
Which kingdom possesses unicellular animal-like species and unicellular plantlike species?
A) Animalia B) Protista C) Fungi D) Plantae