<em>MARK</em><em> </em><em>ME</em><em> </em><em>BRAINLIEST</em>
Answer:
- Continuous cultivation of crops in soil leads to the depletion of certain nutrients.
- If these nutrients are not replenished, soil becomes sterile and unfit for cultivation.
<span>The tracheae possibly have evolved directly from the book lungs</span>
Answer: D.
Explanation: Structural adaptations are physical features of an organism like the bill on a bird or the fur on a bear. Other adaptations are behavioral. Behavioral adaptations are the things organisms do to survive. For example, bird calls and migration are behavioral adaptations.
Answer:
A species that is not native to a particular region is called an <u>invasive species. </u>
Explanation:
In ecology, invasive species can be described as species which are introduced into an environment. These species are not native to the environment.
Introduction of invasive species in an environment can destroy a stable ecosystem. The invasive species will compete for resources like food, shelter, water etc. They might cause the extinction of the species on which they start feeding. They might fight with predators feeding on the same prey.
it's (+/-) 90 degrees. in total it's 180 but the equator is at zero and the two hemispheres have 90 each
