John was changing the oil in his truck. He dumped the used oil around a fence post to keep weeds from growing. John didn't know it, but he was hurting the environment because the oil — rots the base of the fence post and attracts harmful insects
goes deep into the ground and pollutes the groundwater
kills weeds and they are an important part of the environment
attracts more insects that will take over his yard

Which of the following will not cause mass extinction? a. drastic change is weather b. geological change c. both a and b d. none of the above

6. in domesticated cats, the following are independently assorting: normal ears (t) is dominant to tufted ears (t); curved whiskers (c) is dominant to straight whiskers (c); the presence of six toes (s) is dominant to five toes (s); gene for hair length is an x-linked codominant. the three phenotypes for hair length are long (xhxh), medium (xhxh), and short (xhxh); medium is the heterozygous condition. given two parents: ttccssxhxh x ttccssxhy how many different gametes could be formed in the female cat with respect to these four traits? how many phenotypes are possible in the offspring from this mating?

How did the discovery of the rhesus factor affect society? o more patients died from having a transfusion with the wrong rhesus factor 0 new treatments during pregnancy could prevent harm to the developing child. o less donated blood could be used in the treatment of patients. the number of blood types was reduced by half