Question

a student is examining how muscle tissue in the human arm helps the body lift objects. which sequence correctly shows the levels of organization involved in this function, from simplest to most complex?
a. muscle → muscle cell → arm → muscle tissue → human
b. muscle cell → muscle tissue → muscle → arm → human
c. human → arm → muscle tissue → muscle → muscle cell
d. muscle tissue → muscle cell → muscle → human → arm

• 3 points

which statement best explains why plant cells typically have one large central vacuole while animal cells have several smaller vacuoles (or none)?
a. plant cells need more ribosomes, so the vacuole takes their place.
b. the large vacuole stores water to maintain pressure and support the plants structure.
c. plant cells use the vacuole to produce energy during photosynthesis.
d. animal cells do not need to store any materials.

• 1 point

Explanation:

For the first question:

• Option A is incorrect because ribosomes are for protein synthesis, not related to vacuole function.
• Option C is incorrect as vacuoles don't produce energy (mitochondria do for plants).
• Option D is incorrect as animal cells also store materials.
• Option B is correct as the large vacuole in plant cells stores water for pressure and support.

For the second question:

• The levels of organization from simplest to most complex are cell → tissue → organ → organism.
• Muscle cell (cell) → Muscle tissue (tissue) → Arm (organ) → Human (organism). So option B is correct.

Answer:

First question: B. The large vacuole stores water to maintain pressure and support the plant's structure.
Second question: B. Muscle cell → Muscle tissue → Muscle → Arm → Human.