25 Points! Answer correctly and you might just get brainliest! Which of the following describes an interaction between the musculoskeletal system and the respiratory system?

The air sacs absorb more oxygen during vigorous exercise.
The air sacs are used due to signals from the brain.
The blood delivers glucose and oxygen to cells.
The blood carries waste materials to the kidneys.

Which of the following is not considered an appendage of the skin? nails glands follicles none of the above

Humans are believed to have evolved in coastal regions in east africa. the region had an abundant supply of fish for early humanoids to eat. when scientists analyze the fads gene they see an interesting pattern. people whose families have lived in this area of east africa for generation show a high level of diversity in alleles for the fads gene. conversely, people whose families had migrated inland a moderate distance from sources of fish showed a much lower diversity for fads gene alleles. additionally, the fads alleles found in people whose family has lived inland for generation are almost all gene alleles which produce fads proteins with a high level of function and activity. how do anthropologists explain this?

The source of energy shown in the image is (renewable, non renewable, polluting) a drawback of building a dam is that (it will destroy ecosystems, it requires fossil fuels, it won’t be useful for irrigation)