The last two answer choices are Crossing over introduces variety in nature by creating new types of genes.

Crossing over maintains the count of genes and the original alleles in both chromosomes.

Plants that have reproductive structures called cones are?

Research cheetahs on the internet what has contributed to this animal becoming "endangered" or "threatened." what animal you have chosen? -cheetah how long has the animal been endangered or threatened? what has contributed to this animal’s endangered or threatened status? why is it important to save this animal from extinction? after researching and gathering facts, write a 350-word letter from the point of view of an animal rights' activist. be sure to include at least five facts that you learned from your research.

There are only about 250,000 known fossil species. true or false