Thylacosmilus is a marsupial, and Smilodon is a mammal. Thylacosmilus and Smilodon both have saber teeth, but they do not share an ancestor that had saber teeth. What are saber teeth for these organisms?

Piaget theorized there are four times when equilibration, inadequate schemes are reorganized or replaced with more advanced and mature schemes, occurs during development. these stages are called:

Stratifield transitional cell

What mineral is used as a coating for steel to prevent rust and is combined with copper to produce brass?

What natural event might occur at a fault line?

How do different restrictive enzymes produce different DNA fragments from the same DNA molecule?

What happens to air when it heats up

Healthy bodies can come in a variety of shapes and sizes. How would changes in the types of bodies used in advertisements affect the health choices of the general public? a. Decreased use of ectomorph body types will increase pressure to undereat b.

How much of our atmosphere is nitrogen?

What is relative concentration of water in hypotonic solution?

How do scientists use fossils to study earth history