Two groups of related living things are no longer considered to be the same species when

a. They can no longer interbreed.

b. They do not eat the same food.

c. They do not look the same.

d. They become physically separated from each other.

Who is they referred in the following quotation? they also established a number system based on six, diving the hour into 60 minutes and the circle into 360 degrees, as we still do today. a. the akkadians b. the sumerians c. the babylonians d.

What happened to different living things in the Hudson River ecosystem almost 20 years after the zebra mussel invasion?

Which outcome could be expected in a family that carries an X-linked recessive trait? More males than females express the trait. More females than males express the trait. An equal number of males and females express the trait.

the appropriate negative control the researchers most likely used when measuring the reaction rate in the presence of each organism's enolase.

Mammalian evolution began with the evolution of the first synapsids. What is the defining synapomorphy of synapsis? a. the possession of the amniotic egg b. a single temporal fenestra c. the dentary squamosal joint d. respiration with a diaphragm e.

What are 2 ways nitrogen becomes usable to plants, humans and animals?

What factor has the greatest effect on species diversity

A scientist inserts a radioactively labeled DNA molecule into a bacterium. The bacterium replicates this DNA molecule and distributes one daughter molecule (double helix) to each of two daughter cells.

Which type of Rights is the most recognizable feature of property rights

If element X has 76 protons, how many electrons does it have