review bio

What type of growth is shown by the human population? 

• Carrying capacity
• Logistical
• Exponential
• Stabilizing 

Which statement best describes how the use of antibiotics on certain bacteria affects natural selection? 

• Natural Selection is altered because bacteria are killed
• The rate of selection is decreased because antibiotics kill only young bacteria
• Antibiotics alter natural selection by causing bacterial DNA to mutate 
• The rate of selection is increased because antibiotics do not kill bacteria that are naturally resistant to them. 

Which process of the carbon cycle removes carbon dioxide from the atmosphere? 

• photosynthesis
• cellular respiration
• combustion of fossil fuels 
• death and decomposing organisms 

Which process uses ATP to move materials across the plasma membrane against the concentration gradient?

• passive transport
• active transport 
• facilitated diffusion
• osmosis

Which best describes the function of enzymes?

• to speed up chemical reactions in a cell
• to produce cellular energy
• to produce proteins
• to speed up cell division

Which factor determines the shape and function of a protein?

• The density of ribosomes in the cell
• The peptide bonds between amino acids
• The order of the amino acids in the peptide chian
• The sequence of the phosphate molecules in the DNA chain. 

What are the products of photosynthesis? 

• glucose and oxygen
• glucose and carbon dioxide
• glucose and water
• water, carbon dioxide, and energy

Which uses cilia for movement?

• Euglena
• Amoeaba
• Paramecium
• Volvox

In a cell, what does a buffer help maintain?

• A constant temperature
• A low temperature 
• A constant pH
• A low pH

Humans are made up of different cells that preform different functions. From which cells do nerve cells develop? 

• Muscle cells
• Stem cell
• Sperm cells
• White blood cells