The question was; which of the following examples posses the greatest potential threat to biodiversity?
The answer would be; A, constructing oil gas pipelines through old growth forest.
Biodiversity refers to the variability and variety among living organisms from all sources, including terrestrial, marine, and other aquatic ecosystems and the ecological complexes of which they are part. Human activities poss great threat to biodiversity, these include defforestation, and others like construction which involves destruction of trees and other habitats for living thing.
That would be geographical information systems (aka GIS).
What kind of question is this?
This disease is more common in African Americans and
females. Contractures of the fingers are classic for systemic lupus
erythematosus. The butterfly rash on the face is common, occurring in up to 40%
of affected individuals. Joint involvement is common. Pain is generally more
profound in the morning.
Answer:
pre-zygotic reproductive isolation
Explanation:
<em>The molecules regulate the pre-zygotic reproductive isolation mechanism.</em>
<u>Reproductive isolation generally refers to the variety of biological processes that sustain the formation of new species of biological organisms. </u>
Some of these processes <em>act to prevent fertilization or the formation of zygotes between organisms that are not of the same species</em> (pre-zygotic mechanisms) while others <em>ensure that the product of fertilization is invalid</em> in case the former fails (post-zygotic mechanisms).
Some pre-zygotic mechanisms ensure that there exists no form of mating among organisms that are not of the same species due to incompatible reproductive organs, but where this fails, another pre-zygotic mechanism will act so that that the mating will not lead to fertilization and there will not be formation of zygotes.
The prevention of fertilization between organisms with compatible reproductive organs but of different species is carried out by molecules. These molecules ensure that there are locks and keys in place to prevent the fertilization of the egg by the sperm.