Question 1

During DNA extraction from strawberries, why is soap buffer added to the mixture?

Accepted Answer

To break down the cell walls and dissolve the phospholipid membranes, releasing DNA into solution.

Question 2

Which of the following best describes the difference between kinesis and taxis in animal behavior?

Accepted Answer

Kinesis is a random movement in response to a stimulus, while taxis is a directed movement toward or away from a stimulus.

Question 3

Planaria are classified in which phylum?

Accepted Answer

Platyhelminthes

Question 4

Which part of a flower produces pollen?

Accepted Answer

Anther

Question 5

Which of the following plant groups does NOT have vascular tissue?

Accepted Answer

Mosses (Bryophytes)

Question 6

In a plant community, how is species evenness best defined?

Accepted Answer

The relative abundance of each species present in the community.

Question 7

Which type of selection was demonstrated if a population of beetles with intermediate shell color survived best after a predation event?

Accepted Answer

Stabilizing selection

Question 8

Which tissue type is responsible for conducting electrical impulses in vertebrates?

Accepted Answer

Nervous tissue

Question 9

Following an injury, which material is primarily deposited and calcified to form new bone?

Accepted Answer

Collagen matrix

Question 10

Which animal phylum is characterized by the absence of specialized cells forming tissues?

Accepted Answer

Porifera (sponges)

Question 11

Which of the following is a distinguishing characteristic of deuterostomes?

Accepted Answer

The blastopore develops into the anus during embryonic development.

Question 12

Which of the following is an example of a keystone species in a marine ecosystem?

Accepted Answer

Sea otter

Question 13

How many chambers does a fish heart typically have, and how does this compare to a mammalian heart?

Accepted Answer

Fish have 2 chambers; mammals have 4 chambers.

Question 14

Which muscle would you expect to find on the posterior side of a rat's hind limb?

Accepted Answer

Gastrocnemius

Question 15

Which organ is the largest in the rat's body cavity?

Accepted Answer

Liver

Question 16

Which biome is characterized by low rainfall, cold temperatures, and permafrost?

Accepted Answer

Tundra

Question 17

Large herbivores that feed primarily on grasses are called:

Accepted Answer

Grazers

Question 18

Which of the following best describes the function of colorful petals in flowers?

Accepted Answer

To attract pollinators for sexual reproduction.

Question 19

Which of the following is NOT a connective tissue?

Accepted Answer

Epithelial tissue

Question 20

Which of the following equations correctly represents the Hardy-Weinberg equilibrium for allele frequencies in a population?

Accepted Answer

$$p^2 + 2pq$$ + $$q^2 = 1$

General Biology Lab Study Guide: Key Concepts and Applications

Study Guide - Practice Questions