What feature of the fossil Pikaia led scientists to classify it as a chordate?

A. Tentacles

B. A definite head region

C. A notochord

D. Segmentation

Atoms of different elements are. a. too hard to compareb. exactly the same. c. different from each other.

In the formation of a macromolecule, what type of reaction would join two subunits together? A. hydrophobic reaction B. hydrolysis reaction C. dehydration reaction D. denaturation reaction

Where is The worlds supply of usable fresh water found

Guys my science fair project tells me to use 3 agar petri dishes prepared with blood agar but what i am about to buy tells me that they have Hardy Diagnostics Plate, Blood Agar, 15x100mm, 10/pk.

A woman who can roll her tongue (presumably dominant) is married to a man who cannot. Two of their four children can roll their tongues and two cannot. If A = roll tongue and a = cannot roll tongue, then what is the genotype of the parents?

How does molecular genetics add to our understanding of genes?

Which sexually transmitted infection would likely involve the removal of warts as part of its treatment? A-HPV B-HIV C-syphilis D-gonorrhea

How could you separate Tomatoes from a salad?

What is a patient paying if $500 must be paid in order to receive insurance

If evolution does not occur, what happens to the frequency of genes in the gene pool?