Question

Organisms are classified as either prokaryotes or eukaryotes. Which of the following do the cells of all prokaryotes and eukaryotes contain?

{silence}Option A.{silence}
Cytoplasm and a membrane-enclosed nucleus

{silence}Option Be.{silence}
Genetic material and a nucleus that is not enclosed in a membrane

{silence}Option C.{silence}
A plasma membrane and a cell wall

{silence}Option D.{silence}
A plasma membrane and cytoplasm

Answer 1

A student is studying microorganisms and recalls that one type of microorganism decomposes organic matter while another type fixes nitrogen from the atmosphere.

Which two types of microorganisms is the student describing?

Select TWO correct answers.
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Answer 2

During a severe windstorm on an isolated island, some pollen and seeds from conifers are carried high into the air in a cloud of dust. In which of these situations would the dust cloud containing the seeds and pollen be considered an agent for gene flow?

{silence}Option A.{silence}
The dust cloud is subjected to an extended period of ultraviolet radiation, causing a mutation in a gene of the conifer seeds.

{silence}Option Be.{silence}
The dust cloud settles, and a few of the conifer seeds return to the same environment.

{silence}Option C.{silence}
The dust cloud is subjected to electromagnetic radiation from the sun, causing the pollen to be unable to pollinate flowers.

{silence}Option D.{silence}
The dust cloud settles over a forest on a distant, isolated island and pollinates some conifer trees in that forest.