Pretest

What is the original source of almost all energy in most ecosystems?

• carbohydrates
• sunlight
• water
• carbon

Which of the following is the smallest unit of life that can carry out all life functions?

• the mitochondria
• the vacuoles
• the nucleus
• the cell

The energy pyramid shows the energy available to each trophic level in an ecosystem; 

• 10% is passed on to upper levels, & the rest is lost as heat
• how many organisms are in every trophic level
• where the world the ecosystem is located
• how biogeochemical cycles recycle matter

Which organelle contains DNA and directs activities of the cell?

• mitochondria

• chloroplasts

• nucleus

• ribosome

The shrew provides energy for the _______?

• cricket
• grasshopper
• frog
• snake

Which of the following removes carbon from the atmosphere?

• Combustion
• Respiration
• Photosynthesis
• Death

What is the carrying capacity of the following graph?

• 1000
• 8000
• 800
• 600

Waxes, oils and fats are examples of

• Carbohydrates
• Lipids
• Proteins
• Nucleic Acids

What is the function of nucleic acids?

• store genetic information
• store energy (long-term)
• store energy (short-term)
• build skin, hair, nails, muscles

Enzymes belong to which class of macromolecules?

• lipids

• carbohydrates

• proteins

• nucleic acids