<span>Conservation efforts
It is true that conservation efforts have resulted in restoration of some wildlife habitats. Since some animals, over the change of time and of human’s abusive efforts, could no longer live, the governmental an non-governmental organizations and volunteers are now doing ways to alleviate the said problem and so far it has been effective as som species close to extinction was saved (e.g. platypus).</span>
The answer is D) <span>Calculate the probability of a child having either sickle-cell anemia or cystic fibrosis if parents are each heterozygous for both.
The addition rule is used to calculate the probability of one of the events from multiple pathways. If you want that only one of the events happens, you will use the addition rule. In a case when you want to calculate the possibility of a child having EITHER sickle-cell anemia OR cystic fibrosis, you will use THE ADDITION RULE.
For example, in statement B) you will not use this rule because there is no either/or, but both/and. In case, B) you would use the multiplication rule.</span>
The answer is d b/c smaller cells will have greater surface area to volume ratio
