What is the purpose of messenger RNA (mRNA) ?

a) It brings amino acids to the ribosome

b) it becomes a part of the ribosome

c) It contains the code or message that was copied from DNA

d) It delivers telegrams from the nucleus to the outside of the cell

What is an index fossil? A. A fossil formed by the impression of a once-living thing B. A fossil that is found only in one particular time period C. A fossil that appears to show an evolutionary change from one species to the next D.

Which of the following gases is NOT a significant component of the planet's atmosphere? a Oxygen b Nitrogen C Neon d None of the above

1. Which of the following occurs when air is compressed? A. Air temperature rises B. Air temperature cools C. Air molecules move faster D. Both a and c 2. Which of the following is NOT a process that lifts air? A. Convergence B. Orographic lifting C.

If a person with a blood type A had a type o parent, what must the person's genotuype be?

Cells that are the main water-conducting cells of a plant are

Give three examples of places bacteria live.

How can scientists learn from observations

The minimum amount of energy the body uses at complete rest is known as the energy balance. resting metabolic rate. metabolic balance. basal metabolic rate.

When dna fragments are separated by gel electrophoresis, the longest fragments move fastest?

The network of neurons surrounding the central core of the brain that includes the hypothalamus, amygdala, and hippocampus is the