Which of the following is NOT a theory for the dinosaur extinction?

dinosaurs were allergic to pollen

increased radiation levels

diseases from other animals

none of the above

Nida draws a diagram with insects, birds, and mice. She shows the mice eating grass; hawks, snakes, and toads eating the insects; and foxes, hawks, and snakes eating the birds and mice. The snakes are also eating the toads.

What prevents blood movement from left ventricle to left atrium

As a person exercises, the oxygen levels in his body begin to drop. hence, the person begins to breathe more rapidly in order to ensure an adequate supply of oxygen to his cells. this increase in his breathing rate is an attempt to restore:

Who job is it to store nutrients, water, and waste in plant cell

A husband and wife have two sons. One boy has a straight thumb, while the other has a bent thumb. What causes this difference

I have a bar graph dont know how to read it?

Which is a function of cyclins? A) cyclins are carbohydrates that regulate DNA replication during the mitosis phase of the cell cycle. B) cyclins are glycoproteins that repair DNA in the beginning of the cell cycle.

Which is an innovation of gymnosperms?

When you go outside, it is common to hear a variety of bird songs. these songs vary among bird species as well as bird flocks. interestingly, some bird species that are highly unrelated have very similar song qualities.

Two factors which cause global climate change are listed below. Factor 1: Habitat loss Factor 2: Earth's axial tilt Which of these statements is correct about the two factors which cause global climate change?