Question

natural selection scenarios: we do together
page 77
directions: read each situation. decide whether it is a case of overproduction, competition, or variations. some situations may involve one or more causes. circle your decision and explain your reasoning.

1. some species of geckoes are different shades of green. these differences help the species survive in different types of habitats in the regions where they live.

overproduction variation competition
explanation:

1. humans can range in height from minnie me to shaq. these differences are due to the different genes that have been passed down from parents to offspring.

overproduction variation competition
explanation:

1. a species of lions is living in the african plains. over the past year, there has been very little rain, which has caused the water holes to dry up. consequently, the antelope and other mammals of the region are dying due to lack of water. the lions are experiencing a great shortage of food. only the best hunters are surviving.

overproduction variation competition
explanation:

Explanation:

1. The different shades of green in geckos are physical differences within the species that aid survival in different habitats, which is a classic example of variation.
2. The height differences in humans due to different genes passed - down from parents are individual differences within the species, representing variation.
3. The lions facing food shortage and only the best hunters surviving is a situation where lions are competing for limited food resources, which is competition.

Answer:

1. Variation. Explanation: Different shades of green are variations that help with habitat - specific survival.
2. Variation. Explanation: Height differences from gene inheritance are variations within the human species.
3. Competition. Explanation: Lions compete for scarce food due to drought - related food shortage.