<span>The answer is D. Example
of such a relationship is that of a tick and a cow. The tick is the
ectoparasite while the cow is the host.
The tick benefits by sucking blood from the cow while the cow is disadvantaged since it is losing some of its
blood and also the tick is a vector of disease</span>
Answer : Corpus Callosum
Explanation : By the end of the preschool period, the brain structure called the <u>Corpus Callosum </u> becomes considerably thicker, with individual fibers that helps to co-ordinate brain functioning between the two hemispheres.
Corpus Callosum by definition is a thick band of nerve fibers that divides the cerebral cortex lobes into left and right hemispheres in the brain, which connects the left and right sides of the brain allowing for communication between both hemispheres.
The notes describe A- Gene flow. Hope this helps.
Desertification is the inability of ecosystems to fulfill their regulatory function caused by deforestation, overgrazing, and overworking the soil.
<h2>What is desertification?</h2>
Desertification is a phenomenon that implies the loss of fertile soils due to climatic variations and human activities.
- The three main causes of desertification are overgrazing, deforestation, and unsustainable agricultural practices.
- Overgrazing and deforestation destroy the protective vegetation layer that covers arid and semi-arid regions.
Therefore, we can conclude that desertification is the process of ecological degradation through which areas of land that were fertile and productive are transformed into deserts.
Learn more about desertification here: brainly.com/question/2426422
