Physical and chemical barriers that form the body's first line of defense against pathogens include
A) defecation.
B) resident bacteria.
C) tears.
D) earwax.
E) All of the above
Ans: E) All of the above
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Based on the taxa in the picture, which type of habitat is this?
A) fast stream B) slow stream C) pond D) marine
Which blood type lacks the sugar found on the surface of red blood cells in other blood types?
A) type A B) type B C) type AB D) type O
One of the main functions of the cell cycle is to produce daughter cells. What characteristics do the daughter cells have after mitosis is complete?
A) The daughter cells have the same number of chromosomes but the genetic information is different than the parent cell. B) The daughter cells have double the genetic information compared to the parent cell. C) The daughter cells have the identical copies of the genetic information compared to the parent cell. D) The daughter cells have half the genetic information compared to the parent cell.
Which of the following is NOT one of the key adaptations to land shared by all land plants?
A) A means of taking up nutrients from the soil B) Waxy cuticle C) Stomata D) Water transport by xylem E) Protected embryos