Resource competition, disease, and predation are what kind of controls on population
growth rates?
1. density-independent
2. age-specific
3. population-sustaining
4. density-dependent

Acceleration is a direct result of a.) balanced forces b.) unbalanced forces c.) gravity d.) velocity

Suppose you have monohybrid pea plants in your garden and find that they produce round seed to wrinkled seeds in the ratio of 3: 1. if the allele are designated (r & r) receptively. what is the probable genotypes of the round seeds which produced f 1 ? rr & rr rr only rr & rr rr only rr only

Amino acids contain the elements carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. of the 20 amino acids found in humans, 11 are called "nonessential" because they can be manufactured by the body when needed. which elements in these 11 amino acids are commonly obtained from the metabolism of sugar molecules?