MNSH Biology Reinforcement

Biology Reinforcement

Questions #1- #10

Multiple Choice

#1 According to cell theory, which of the following best describes the role of cells in living organisms?

• Cells make up the soft portions of tissues in living organisms

• Cells are the basic functional units of living organisms

• Cells join together to form multicellular organisms

• Cells are responsible for coordinating activities in multicellular organisms

Multiple Choice

#2 Factors that affect blood flow in Humans is very important. Dilate means to become wider and contract means the opposite. Which of the following statements best describes what happens to blood pressure during exercise?

• Blood vessels in the heart dilate to increase blood pressure

• Blood vessels in the organs contract to increase blood oxygen

• Blood vessels in the lungs contract to decrease blood volume

• Blood vessels in the muscles dilate to increase blood flow

Multiple Choice

#3 Which of the following is a structure that is present in both eukaryotic and prokaryotic cells?

• vacuole

• plasma membrane

• nucleus

• Golgi complex

Multiple Choice

#5 Tuberculosis (TB) is a disease caused by a bacteria called Mycobacterium tuberculosis. The bacteria usually attack the lungs, but they can also damage other parts of the body. TB spreads through the air when a person with TB of the lungs or throat coughs, sneezes, or talks and can often be fatal.

For several decades, antibiotics were very successful in killing tuberculosis bacteria, but now strains of the bacteria have developed that can only be killed when treated for long periods of time with multiple types of antibiotics. Why have the antibiotics become less effective against tuberculosis?

• The antibiotics tend to become weaker over time as they accumulate mutations

• Any bacteria with mutations protecting them from the antibiotics were more likely to live and pass on the mutations to future generations of bacteria

• Human immune systems have adapted to the presence of bacteria, causing antibiotics to be less effective

• Those bacteria that have once come in contact with antibiotics learn to avoid them and are difficult to kill

Multiple Choice

#6 When scientists set out to test a hypothesis, it is often most practical to try to prove the hypothesis false rather than to prove it is true in all cases. Scientists place great confidence in cell theory, yet it has not been tested in every living thing on the planet.

What piece of evidence would cause scientists to decide that cell theory would need to be revised?

• Cells were found that used something other than DNA as hereditary material

• An organism was found with tissues made of something other than cells

• A cell was found that could continue to divide and reproduce indefinitely

• An animal cell was found that could harness solar energy as plant cells do

Multiple Choice

#7 Which of the following would increase blood flow?

• an increase in vein length

• an increase in blood viscosity

• a decrease in heart rate

• an increase in blood pressure

Multiple Choice

#8 According to modern cell theory, how do new cells develop?

• New cells appear by spontaneous generation

• Cells form from non-living materials, in a manner similar to how crystals are formed

• Cells come from preexisting cells through cell division

• A membrane forms around DNA that is released from a parent cell, and the DNA contains the information needed to produce organelles

Multiple Choice

#9 In the diagram of the brain shown below, which area correctly indicates the occipital lobe?

• Area A

• Area B

• Area C

• Area D

Multiple Choice

#10 Which of the following factors has the greatest effect on blood pressure?

• blood pH

• blood oxygen levels

• blood glucose levels

• blood volume