Biology Exam

place where an organism or a group of organisms live

Name the 3 main causes for the extinction of species:

Tags

NGSS.MS-ESS3-4

NGSS.MS-LS4-1

Characteristics of living things

• move, breathe, eat and live

• Breathe,develope, reproduce and grow

• need food, move, breath and reproduce

The image below shows a phylogenetic tree that compares many known organisms. Based on the information in this phylogenetic tree, which of the following statements correctly makes a claim about fungi?

• Fungi are closer to bacteria than plants.

  
  

• Fungi are closer to bacteria than animals.

• Fungi are closer to animals than plants.

• Fungi are closer to animals than bacteria.

Tags

NGSS.MS-LS4-2

The word helix means spiral. What does this tell you about the structure of DNA, which is a double helix molecule?

• The nucleotides of the two strands bond together with spiral bonds.

• A double-stranded DNA molecule is composed of two linear strands that run opposite to each other, or anti-parallel, and twist together to resemble a twisted ladder.

• DNA is a double helix because it has two strands held together like a spiral staircase.

• Nucleotides are spiral-shaped molecules that bond together to form DNA.

During daytime, the rate of photosynthesis is faster than the rate of cellular respiration. A plant is placed in a clear, airtight container with a mechanism to allow its roots to get water. Will it be able to sustain itself?

• No, because the plant would need ATP to complete cellular respiration.

• No, because the plant would need oxygen to complete cellular respiration.

  
  

• Yes, because the amount of oxygen produced during the daytime would be enough to allow for

• Yes, because the amount of carbon dioxide produced during the daytime

Tags

NGSS.MS-LS1-6

Which of the following events in digestion and absorption is incorrect?

• Carbohydrate digestion begins in the mouth.

• Protein is primarily digested in the stomach.

• Fats are primarily digested in the small intestine.

• Digested carbohydrates, fat, and protein molecules are absorbed by the villi in the small intestine.

Sodium and potassium are necessary electrolytes. As a result, the human body uses a great deal of energy keeping these electrolytes in balance. Explain why the body needs to use energy for this process.

• ATP is required to release potassium ions outside the cell.

• ATP is required to allow entry of sodium ions inside the cell.

• ATP is required to allow entry of potassium and sodium ions inside the cell.

• ATP is required to move sodium ions against their concentration gradient outside the cell.

A reaction in which a water molecule is added to a large molecule in order to break it into multiple smaller molecules. Which type of reaction is described above?

• hydrolysis

• enzyme reaction

• catalysis

• dehydration synthesis

A lack of protein in the diet can cause hair loss. Which of the following statements explains why this occurs?

• Due to lack of protein in the diet, energy will be lost, leading to hair loss.

• Due to lack of protein in the diet, our body will not be able to form other proteins; it will conserve the protein it has for critical use, leading to hair loss.

• Lack of protein in the diet can weaken the immune system, leading to hair loss.

• Lack of protein in the diet will lead to breakage of disulfide bonds between proteins, leading to hair loss.