Chapter 32 Blue Thread Question 2 <) 7 of 18 I Review Part A Why is the relative size of the yolk sac in a mammal egg much smaller than that found in an amniotic egg? The yolk sac is relatively smaller in the mammal because its function in an amniotic egg (source of nutrients) has been taken over by the placenta. Because amniotic eggs develop outside the body, they require larger yolk sacs to support embryos exposed to variable environmental temperatures. Mammal eggs develop at a more constant, favorable temperature inside the body. Amniotic eggs require larger yolk sacs to support longer maturation times compared to mammal eggs that develop more quickly. The embryos of animals with amniotic eggs like reptiles are larger than the embryos of placental mammals, so they need more nutrients. Submit Request Answer

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Intelligence

Intelligence refers to the intellectual functioning that compares a person's intelligence quotient (IQ) with other people of the same age. In other words, it is the ability to understand circumstances or situations and arrive at appropriate solutions. Both animals and plants exhibit intelligence.