According to this tree, what percent of the species seem to be extant (in other words, not extinct) ?

What is the reason offspring of the organism Hydra often appear exactly the same as their parents? A) Hydra may reproduce asexually. B) Parent Hydra undergo sexual reproduction. C) A single cell will not develop into a full organism.

How many chromosomes does a human zygote have?

The cells of a fully grown adult still undergo mitosis. Why is the useful?

With the discovery of DNA, we learned that classification arguments could be settled by comparing___sequences.

Which is the best reason that a geologist might carry a small dropper bottle filled with hydrochloric acid when doing fieldwork?

Which statements are true of heterogeneous mixtures? 1) they settle out. 2) the proportions of solute to solvent may vary. 3) the solute is evenly distributed throughout. 4) they are composed of two solvents and two solutes. a. 1 and 2 b. 2 and 4 c.

Why do plants not need heterotrophs

During development, individual cells of the same organism begin to produce different proteins because A) not all cells can synthesize proteins. B) specific genes are activated in the cells. C) the cells have different numbers of chromosomes.

Most scientists believe earth's early archean atmosphere was formed primarily by gases released from:

Choose the words to finish the sentence A strand of DNA is a polymer of Choose ... joins by covalent bonds between the Choose ... of one monomer and the Choose ... of the next monomer A strand ...