The drawings below show a young sunflower plant at different times of the day.
Which of the following describes the plant's movement?
A.
It bends away from the pull of gravity.
B.
It bends away from light.
C.
It bends toward light.
D.
It bends toward water.
C. It bends toward light.
What is the role of carbohydrates in animal cells?
A.
synthesizing proteins
B.
developing enzymes
C.
storing energy
D.
protecting the cell wall
C. Storing energy
Why does active transport require energy to move molecules of a substance across a cell membrane?
A.
Lack of the substance makes the cell weak.
B.
The substance moves from low to high concentration, against the concentration gradient.
C.
The cell membrane is very thick.
D.
The substance moves from high to low concentration, with the concentration gradient.
B. The substance moves from low to high concentration, against the concentration gradient.
An investigation is set up to study the movement of water through a membrane. The results are shown in the diagram.
Based on these results, which statement correctly predicts what will happen to red blood cells when they are placed in a beaker containing a saltwater solution that has a salt concentration much higher than that of the red blood cells?
Without the diagram or any specific information about the results, it is not possible to make an accurate prediction.
The table shows the direction and function of substances in a chemical reaction that takes place in the chloroplasts of plant cells. The table is missing a title and information at W, X, and Y.
Title:____________________
Substance Direction In the Reaction
(In or Out) Function In the Reaction
Carbon dioxide In Used to make other substances containing carbon
Oxygen Out Is a product of the chemical reaction
W In Provides the main energy source for the reaction
Sugar molecules X Y
Water In Splits and is used to provide oxygen and hydrogen atoms for the reaction
What is the direction, X, and function, Y, for the sugar molecules?
A.
Direction X is out; function Y is to provide chemical energy for the plant cell.
B.
Direction X is in; function Y is to provide heat energy for the plant cell.
C.
Direction X is out; function Y is to form more chlorophyll for the plant cell.
D.
Direction X is in; function Y is to form large sugar molecules for the plant cell.
D. Direction X is in; function Y is to form large sugar molecules for the plant cell.
The model shows an animal cell.
The image shows the organelles within an animal cell. The ribosomes, nucleus, mitochondrion, cell membrane, and Golgi apparatus are labeled.
Which describes an interaction between the Golgi apparatus and another organelle to maintain the cell's homeostasis?
A.
The Golgi apparatus stores nutrients provided by the mitochondria.
B.
The Golgi apparatus sorts and packages proteins created by ribosomes.
C.
The Golgi apparatus collects genetic information to be used by the nucleus.
D.
The Golgi apparatus sends and receives chemical signals for the membrane.