<span>Cattle and sheep are exposed to lead and zinc when these poisons are in the grass/soil.
Cattle and sheep graze on the grass, and thus they intake these minerals, such as lead and zinc when they come in contact with grass or earth they may eat along with grass. Thus they are exposed to them via eating.
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Answer:
The answer that you want to pick is
A-Oogenesis occurs in females, but spermatogenesis occurs in males.
Explanation:
Think about how babies are made you need a male and a female.
Because for female sex link desease would require X°X° but for male X°Y so during crossing X linked dear are more common in male.
Answer:
Explanation:
The five major types are:
Predation
Mutualism
Parasitism
Competition
Commensalism
