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?

After what stage does the nucleaus of the parent cell divide into two new nuclei

Which of the following would characterize a nonhereditary disease of white blood cells? Excessive bleeding that will also be prevalent in other family members Excessive bleeding that will not be prevalent in other family members Inability to fight

In order to determine the shape of human muscle cells, a scientist should?

Give a scientific explanation of evolution.

What effects do keystone specie shave on an ecosystem? A. They make prey species extinct B. They reproduce biodiversity C. They keep populations of species balanced D. They cause primary disturbances.

Which of the following species is most likely to be an invasive species if introduced into a favorable new habitat? a. Oyster b. Fish c. Rabbit d. Bobcat

Which would BEST allow a species to survive environment changes

You discover a very slow-growing plant that has extremely tiny leaves that are covered in a thick layer of wax and succulent stems. in which biome did you most likely discover this plant?

Any change in the normal nucleotide sequence that codes for an amino acid is called a

What are the 3 functions of the membrane proteins?