: Spot, the giraffe, is not a clone of his father. He inherited DNA from both of his parents. Chromosomes are condensed units of DNA. If Spot has 30 chromosomes, you would expect that Spike would have inherited chromosomes from his mother andchromosomes from his father. A 30 B 25 C 20 D 15

What have we learned from fossil evidence about evolution? a) it is an abrupt change. b)the process is observable. c) it takes place during one lifetime only. d)the most complex traits are always selected.

Invasive species are one of the major threats to biodiversity. these species multiply quickly and compete with native species for food, sunlight, spac and other resources. on the map, determine the area where native species will have limited resources available to them due to invasion threat from invasive species threat very low low medium high very high

Select the correct answer from each drop-down menu. in an experiment, dr. travis examined the effects of calcium intake on osteoporosis, a condition that causes an increased risk of bone fractures. the amount of calcium is variable. the risk of bone fractures .