A terrestrial ecosystem is a land-based community of organisms.
D.uracil is the nitrogen base bind with adenine
Answer: hybridisation between related species is unlikely to contribute to adaptive speciation.
Explanation: any population has natural genetic variation. The available resources are insufficient for all plants (and conversely, not all offspring survive). Natural selection favours variations better suited to the conditions.
Although hybridisation is more common in plants than animals, and can lead to speciation, adaptive radiation from an ancestral species is the general response to environmental change, such as from rainforest to savanna. There is low probability of selective advantage from hybridisation of two ancestral species adapted to niches within the original habitat when the conditions in those niches changes significantly.
I believe it's true, sorry if it's not. I just can't find any research to prove if my answer is correct or not.
Answer:
It was found on Earth’s surface.
Explanation:
Igneous rocks are formed either<em> on the surface of the Earth</em> or <em>deep in the Earth's crust.</em> Those formed on the surface of the Earth are called <em>"Extrusive Igneous Rocks" </em>while those formed in the crust are called<em> "Intrusive Igneous Rocks." </em>
An igneous rock which has<em><u> small, dark crystals</u></em> is an extrusive igneous rock (this makes the first choice incorrect). It was formed through "rapid cooling," thus, it's texture is<em> fine</em> (this makes the last two choices incorrect).
Since it is an extrusive igneous rock,<u> it can be found on the Earth's surface. </u>This makes the third choice correct.