Which of the following blood cells fights infections?

A. Platelets
B. White blood cells
C. Red blood cells
D. Fibrin


Answer: B

Biology & Microbiology

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Up until the late eighteenth and early nineteenth centuries, many naturalists believed that all species of living organism(s) had been created separately and had remained unchanged since the creation. Around that time, scientific research provided findings that were contradictory to that idea. All of the following are findings that contradict the idea of a single creation. Choose the exception

a. As scientists explored more of the earth, they found that different groups of organisms were found in the different regions. b. Even though the limbs of various mammals carry out different functions (swimming, gliding, running, holding, etc.), the bone patterns are very similar. c. Some fossils of extinct organisms are quite different from living organisms. d. The limbs of some mammals serve the same purpose but their bone patterns are very different. e. The platypus is only found in Australia and the dodo was only found on Madagascar.

Biology & Microbiology

how to identify HPV?

What will be an ideal response?

Biology & Microbiology

An adult axolotl salamander (Ambystoma mexicanum) retains the juvenile characteristics of external gills and a tail fin

This is an example of what mechanism? a. allometry b. hybridization c. preadaptation d. paedomorphosis e. adaptive radiation

Biology & Microbiology

Behaviors that are learned easily and by all (or nearly all) individuals in a species are called:

a. reciprocal altruism. b. prepared learning. c. fixed action patterns. d. instincts. e. innate behaviors.

Biology & Microbiology