Earth / Space Science

Answer quickly and ill give you brainliest.

During which eon did oxygen first appear in the atmosphere?

A. Hadean

B. Archean

C. Proterozoic

D. Phanerozoic

Some cell types contain thousands of mitochondria. These cells are likely to use large amounts of which of the following?

What is the relationship between the location of a biome on the planet and its amount of biodiversity? A. The further east a biome is, the greater the number of species living there. B.

The key factor that determines whether the undifferentiated gonads develop into testes is the A. secretion of testosterone from the adrenals. B. secretion of androgens from the gonads. C. gene Sry located on the X chromosome. D.

Why are vitamans esential to your body?

A change in DNA resulting in an incorrect protein is the problem in sickle cell disease. Is this normally the problem in genetic diseases? A. Yes, the DNA may be "correct" but can produce abnormal proteins which cause disease. B. No.

If you have six glucose molecules and you link them together using a dehydration synthesis reaction, how many bonds would you create?

how to distinguish a male and a female skeleton based on the structure of the pelvis? explain why this is so

How is ruminants stomach different from human stomach?

A group of scientists designed a clinical study to investigate the effects of cholesterol deficiency in humans. For the duration of the 8-week study, the adult subjects must live in a special research unit of a hospital.

What is spilicing and where does it occur exactly correct answer