Which of the following indicates that only a physical change has taken place?

Which of these elements is rarely found in organic molecules?

If a cell had 18 chromosomes, how many chromosomes would each daughter cell have after mitosis? a. 9 b. 36 c. 18 d. cannot be determined

There are three animal phyla that include "worm" in their common names. Why aren't all worms placed into one phylum? What is different about each group of organisms that requires us to classify them into multiple phyla? Provide examples.

Larry's science teacher mentioned protozoans in one of their classes. She said that protozoans are organisms that consume other living organisms to obtain energy. In which category will protozoa be? A. plant-like protist B. animal-like protist C.

The resistance trait needs to be inherited by daughter cells in order for a resulting population of to the drug 2· bacteria after selection to become resistant to a drug. a. True b. False

Which of the following is not a macronutrient? A) Carbohydrates B) Protein C) Vitamin C D) Fat

Agglutinins are surface antigens on RBCs. contain abundant stained "granules." prevent blood clotting. are antibodies that will attack surface antigens on RBCs of a different blood type.

Which of the following best explains why humans need constant supplies of fresh water? a. Humans need a constant supply of water to provide them with essential vitamins. b. Humans need a constant supply of water to maintain proper hygiene. c.

Which one of the following would be a good tool to represent data in terms of percentage of a whole?

A. E. coli is able to use foods other than glucose in the absence of available glucose, because falling levels of glucose cause an increase of B) activator protein A) operator B) promotor C) structural gene D) CAMP