If the age of the middle layer of a rock sample is between 600 million years and 1 billion years, which of the following could be the age of the topmost layer?
Group of answer choices

1.5 billion years to 2.5 billion years

2.5 billion years to 3.5 billion years

800 million years to 950 million years

200 million years to 550 million years

Diabetes is often suspected when glucose shows up in urine tests. use the model to explain how glucose could be present in urine. why do you think this symptom is especially concerning for young people?

The picture represents a structure of the respiratory system. which is the function of this structure? to bring air into the body to exchange oxygen with carbon dioxide to carry air to the lungs to release oxygen from the body

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.