1. Homologues structures are structures in different organisms that are similar because:
|They share the same environments.|
|They evolved from the same ancestors.|
|They are not similar at all, only superficially appear so.|
|None of the given asnwers are correct.|
1. Barriers to reproduction between closely related species before the sperm and egg have fused are referred to as:
1. Beaver tend to create conditions that increase biodiversity at the landscape level.
1. During succession of old field to forests in new England what would best describe the sequence of tree types?
|Shade tolerant, shade intolerant|
|Shade intolerant, shade tolerant|
|Shade intolerant, drought resistant|
|Drought resistant, shade intolerant|
(a) The types of organisms being affected by it.
(b) The extinction rate exceeds historical extinction rates.
(c) It affects only species that are rare anyway.
(d) None of the above.
|The types of organisms being affected by it.|
|The extinction rate exceeds historical extinction rates.|
|It affects only species that are rare anyway.|
|None of the given answers are correct.|