Active Transport. In contrast to passive transport that does not require energy to transport substances across the plasma membrane, active transport requires energy to maintains the balance of transporting molecules across the cell membrane.
Answer: A
Explanation: the change in seasons is caused by Earths axis tilt and revolution and position near the sun
<span>C. the primary consumers would die out or move elsewhere
</span>An distortion in an ecosystem mainly like plants can insidious consequences in an ecosystem. With primary consumers dependent on autotrophs as the source of food and thus, energy if these resources are gone then they would probably die or migrate somewhere else.
<span>Ecosystem composes both the biotic and abiotic factors that make up the entire ecological system balanced and functioning. If ever one factor has cease to exist and that special element plays a major role in the food chain, scarcity will lead to extinction. </span>
The circulatory system<span> is the transport </span>system<span> for </span>endocrine<span> information. While the nervous </span>system<span> uses neurons, the </span>endocrine<span> chemicals and hormones must circulate through the body via blood vessels. Many glands in your body secrete hormones into the blood.</span>