How are undisturbed rock layers dated

What separates the oral cavity from the nasal cavity?

When do blue crabs change from a larva to an adult crab

Pangolins are capable of reproducing when they are two years old. Which of the following is necessary for any individual pangolin to reproduce? A. the ability to bear multiple young at once B. the ability to fight off predators C.

What is one disadvantage of fossil fuels? A. They are widely available. B. They are relatively expensive. C. They are easy to use and transport. D. They can cause significant pollution.

What is the purpose of natural selection?

Pregnancy comes with a unique set of diet and lifestyle guidelines. Some substances are particularly beneficial for the mother or baby, others are harmful, and some should be used with caution. Drag the appropriate items to their respective bins.

This type of galaxy gets its name from its characteristic oval shape

How are embryonic stem cells different from adult stem cells?

Explain what typically marks the beginning and end of any division of time on the geologic time scale?

a person with an impaired lymphoid system would? A. get sick more often B. grow too quickly C. not be able to digest fats D. not be able to transport oxygen to the cells