BIO 191 UNLV MIDTERM REVIEW SHEET
2026 QUESTIONS WITH ANSWERS GRADED
A+
⩥ What are functions of water in plants? Answer: transport of solutes,
source of hydrogen for photosynthesis
⩥ Green plants extract __ energy from the sun, while animals extracts __
energy from organic compounds. Answer: light energy, chemical energy
⩥ Flowering plants can be heterotrophic. True or False Answer: True
⩥ This compound, which is required for photosynthesis, enters most
plants through their stomata. Answer: CO2
⩥ Why is carbon considered to be an essential plant nutrient?. Answer: It
is taken up by growing plants, and the carbon is a component of all
organic molecules in the plant.
⩥ Which nutrient is the source of most of the hydrogen atoms and some
of the oxygen atoms in organic compounds? Answer: water
, ⩥ In plants chemical energy for metabolism comes from organic
molecules that are Answer: synthesized using light energy
⩥ On a walk through a forest, you come across a small, white plant you
recall as Indian Pipe. Since it is white you determine that it has no
chlorophyll. How does it obtain energy? Answer: From organic
compounds obtained from other organisms.
⩥ Carbon dioxide enters plants through pores in their leaves called
Answer: stomata
⩥ Arrange the soil layers in order. Start with the uppermost layer on top
and end with the lowermost at the bottom. Answer: Topsoil, subsoil, soil
base, bedrock
⩥ Which of the following is a soil feature that enhances plant growth?
Answer: The presence of humus
⩥ What is leaching Answer: The dissolution and removal of inorganic
ions as water percolates through the soil.
⩥ Why is a humus a beneficial component of soil? Answer: Lessens
erosion, Binds mineral nutrients to improve fertility, soft consistency
fosters root growth.
2026 QUESTIONS WITH ANSWERS GRADED
A+
⩥ What are functions of water in plants? Answer: transport of solutes,
source of hydrogen for photosynthesis
⩥ Green plants extract __ energy from the sun, while animals extracts __
energy from organic compounds. Answer: light energy, chemical energy
⩥ Flowering plants can be heterotrophic. True or False Answer: True
⩥ This compound, which is required for photosynthesis, enters most
plants through their stomata. Answer: CO2
⩥ Why is carbon considered to be an essential plant nutrient?. Answer: It
is taken up by growing plants, and the carbon is a component of all
organic molecules in the plant.
⩥ Which nutrient is the source of most of the hydrogen atoms and some
of the oxygen atoms in organic compounds? Answer: water
, ⩥ In plants chemical energy for metabolism comes from organic
molecules that are Answer: synthesized using light energy
⩥ On a walk through a forest, you come across a small, white plant you
recall as Indian Pipe. Since it is white you determine that it has no
chlorophyll. How does it obtain energy? Answer: From organic
compounds obtained from other organisms.
⩥ Carbon dioxide enters plants through pores in their leaves called
Answer: stomata
⩥ Arrange the soil layers in order. Start with the uppermost layer on top
and end with the lowermost at the bottom. Answer: Topsoil, subsoil, soil
base, bedrock
⩥ Which of the following is a soil feature that enhances plant growth?
Answer: The presence of humus
⩥ What is leaching Answer: The dissolution and removal of inorganic
ions as water percolates through the soil.
⩥ Why is a humus a beneficial component of soil? Answer: Lessens
erosion, Binds mineral nutrients to improve fertility, soft consistency
fosters root growth.
