Question

1. which of the following is the best example of how a tissue differs from an organ?

a. a tissue is made of multiple organ systems working together, while an organ is made up of many tissues.
b. a tissue is a group of similar cells working together, while an organ is made of multiple tissues working together.
c. a tissue is larger than an organ because it includes organ systems.
d. an organ is made of cells that all have the same structure and function, and a tissue does not.

1. the diagram shows four different human cells. match each cell to its correct function.

image of cells a (long, branched), b (cylindrical, full of mitochondria), c (round, disk - shaped), d (branched extensions) and functions 1 (carries oxygen), 2 (transmits electrical signals), 3 (contracts to produce movement), 4 (fights infections)
24.
a. a - 2, b - 3, c - 1, d - 4
b. a - 3, b - 1, c - 2, d - 4
c. a - 2, b - 3, c - 1, d - 2
d. a - 1, b - 3, c - 2, d - 4
a paramecium is a unicellular organism that lives in freshwater. its nucleus stores genetic information and controls cell activities. its contractile vacuole pumps out excess water so the organism doesnt burst. the mitochondria release energy from food molecules, and the cilia help the paramecium move and sweep food into its oral groove.

1. which organelle prevents the paramecium from filling with too much water?

a. nucleus
b. contractile vacuole
c. cilia
d. mitochondria

Explanation:

Question 22

To determine the correct answer, we analyze each option:

• Option A: Incorrect. A tissue is not made of organ systems; organ systems are made of organs, and organs are made of tissues.
• Option B: Correct. By definition, a tissue is a group of similar cells working together, and an organ is made of multiple tissues working together.
• Option C: Incorrect. Tissues are not larger than organs; organs are composed of multiple tissues.
• Option D: Incorrect. A tissue has cells with similar structure/function, while an organ has multiple tissues (so cells with different structures/functions).

• Cell A (long, branched): This is a neuron, which transmits electrical signals (Function 2).
• Cell B (cylindrical, full of mitochondria): This is a muscle cell, which contracts to produce movement (Function 3).
• Cell C (round, disk - shaped): This is a red blood cell, which carries oxygen (Function 1).
• Cell D (branched extensions): This is a white blood cell, which fights infections (Function 4).

So the correct matching is A - 2, B - 3, C - 1, D - 4, which corresponds to option a.

• Option a (Nucleus): The nucleus stores genetic information, not related to water regulation.
• Option b (Contractile vacuole): The question states "Its contractile vacuole pumps out excess water so the organism doesn't burst", so this organelle prevents the paramecium from filling with too much water.
• Option c (Cilia): Cilia help with movement and sweeping food, not water regulation.
• Option d (Mitochondria): Mitochondria release energy, not related to water regulation.

Answer:

B. A tissue is a group of similar cells working together, while an organ is made of multiple tissues working together

Question 23 and 24 (Cell - Function Matching)