Alleles are used by cells to make proteins. When an allele changes, the protein that the cell makes also changes. The new alleles cause the cell to make new proteins. How do you think new proteins affect the fitness of children?

1.They have no effect on fitness
2.They increase fitness
3.They decrease fitness
4.All of the above

Where do the respiratory and circulatory systems meet? a. in the heart b. in the muscles c. in the lungs d. in the brain

What is turgor pressure, what causes it, and what does it do for a plant?

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.