Scientists performed many experiments on the challenger. these experiments did not include
deep sea trawling
bottom sampling
water analysis
sonar soundings

Secondary pollutants are more harmful than primary pollutants. select the best answer from the choices provided ot of

Genetic disorders can result when sister chromatids fail to seperate properly. during what phase is this problem most likely to occur?

16 select the correct answer from each drop-down menu. sharks, whales, and dolphins share similar features such as body shape and the position of fins. hoy while whales and dolphins have lungs. these differences indicate that the organisms share a comme whales also possess a vestigial pelvic bone. the presence of the pelvis bone may indicate that whales reset next