<span>Transfer of materials into a cell against a concentration gradient from low to high concentration requires active transport because you need energy for it to happen since its going againist the concentration gradient.
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Answer:
cows - They give us milk for calcium & gobar for gobar gas.
BUFFALO -They also give us milk.
dogs -They work as security in our house & they are faithful than others.
CAT- They catch mice from our home & keep our house clean.
GOAT - We domesticate them for the production of meat.
Explanation:
The endocrine system or the skin (:
<span>The tropical climate is found northward and southward from the equator to about 15 to 25° of latitude. </span><span>
In tropical climates, where strong insolation makes temperatures high, all that is needed for intense daily convectional storms is </span>a source of humidity. A<span>ll months have average temperatures greater than 18° Celsius.</span>
The testicles produce the sperm and the hormones
