Frogs<span> are at the bottom of the food chain; they need a lot of offspring in order to offset how many are being eaten everyday. Basically, </span>gametes<span> are sex cells. ... So to increase the chances of fertilization </span>frog produce large<span> no. Of </span>gametes<span> and basically sprays them over eggs released by female.</span>
Answer:
The circulatory system of the crayfish is an open system where the blood is contained in vessels for only part of the system. The heart is located in a pericardial sinus located in the upper part of the thorax (a sinus is a sac or cavity). The heart pumps the blood into the arteries.
Explanation:
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<span>The best answer to the question above is (c.) follicle. In the female body, each egg is surround by a follicle, which breaks open when the egg is mature. This follicle helps the egg to move around and catch the sperm cells during the fertilization.</span>
Doing so is an example of using biology to improve human health.
