LS 3rd 9w FINAL REVIEW

Which of these is MOST likely to increase the chances that a giraffe will survive in an environment that is changing quickly?

• competing with other giraffes

• living longer

• producing offspring that are all very similar

• having a lot of variation in the gene pool

According to Darwin, the variations among tortoises that he observed in the Galapagos Islands resulted from.

• the passing down of acquired traits

• use or disuse of their necks

• natural mutations

• natural selection

Which of these BEST describes the positive aspects of genetic variation within birds of paradise?

• It guarantees that some birds will survive an environmental change

• It happens even when the birds are isolated

• It lets most organisms find the right mates.

• The individual birds do not have to use as much energy to survive.

The cheetah has been listed as an endangered species since 1975. Which natural event has most likely led to this species being unable to adapt and becoming endangered?

• climate change

• a decrease in genetic diversity

• a decrease in bad weather

• an increase in predators

Which of these would be the LEAST important adaptation for human survival?

• speaking

• walking

• hair color

• having thumbs

A researcher cross-pollinates a watermelon plant that is resistant to bacteria with a watermelon plant that produces large fruit. This is an example of

• selective breeding

• genetic engineering

• asexual reproduction

• natural selection

Many farmers want their crops to produce greater amounts of plants than average. Which process would help the farmer develop plants with this ability?

• geographical isolation

• ecological succession

• behavioral modification

• selective breeding

Based on the dogs pictured in the photo, which characteristic do you think they are specifically bred for?

• retrieving ability

• coat length

• size

• color

Scientists are utilizing selective breeding to improve the health benefits of particular vegetables. Which statement BEST explains why improving these health benefits of vegetables by selective breeding is a positive thing to do

• healthier vegetables require more types of resources to grow

• vegetables that are selectively bred will absorb more nutrients from the soil they are planted in

• an increase in the availability of healthier vegetables will decreases rates of malnutrition

• the production of nutrients in foods from selectively bred vegetables will decrease the rate of disease in vegetables

Which is the BEST explanation for the physical differences between these two dogs?

• the dogs ate different types of food

• the dogs live in different environments

• each type of dog was trained to do a specific job

• each type of dog was bred for specific traits