Question

scientist is interested in seeing how tall a certain species of plant will grow if it is kept under red light for 3 months. what would be a valid hypothesis for this experiment?
a) if plants are grown under different colored lights, then they will grow different lengths.
b) if the amount of sun per plant is changed, then the plant will grow.
c) the light is red, the plants will grow.
d) if a plant is green, then the plants will grow under the red light.
question (1 point)
what is the role of the nucleus of the cell?
a) to generate energy
b) to hold and protect the cells dna
c) to provide a cell membrane through lipids
d) to make protein.
question (1 point)
the organelle that builds proteins for the cell are the ________.
a) ribosomes
b) chloroplast
c) cytoplasm
d) mitochondria

Explanation:

First Question (Plant Experiment Hypothesis)

A hypothesis for the plant experiment (growth under red light) should relate the independent variable (red light) to the dependent variable (plant growth). Option A talks about different colored lights (not focused on red), B about plant type, C says light doesn't affect (contradicts the experiment's focus), D states "If I use red light, then the plants will grow" which connects red light to growth.

The cell membrane's role: A is for mitochondria, B is about adding proteins (not a main role), C is about cell wall (in plants, but membrane is semi - permeable, controls what enters/exits), D is for ribosomes. The membrane controls what enters/leaves the cell, so C is correct.

Ribosomes are the organelles that build proteins. Mitochondria (A) make energy, nucleus (B) stores DNA, cytoplasm (D) is a fluid. So the answer is ribosome (assuming one of the options is ribosome, likely the option corresponding to ribosome, e.g., if one of the options was ribosome, but from the given options, if we assume the correct option is the one for ribosome, say if the options were as per standard, and the correct one is the ribosome - related option. If the options are as in a typical question, the answer is ribosome (but based on the given options, if we assume the correct option is the one for ribosome, e.g., if the options were like A. Mitochondria, B. Nucleus, C. Ribosome, D. Cytoplasm, then C).

Answer:

D. If I use red light, then the plants will grow

Second Question (Cell Membrane Role)