BIO 230 Exam #3 (SFSU) 2026 Exam
Questions and Verified Answers |
Already Graded A+
Which of the following statements about how plants get their food is most
scientifically accurate?
a. plants absorb organic substances from the soil
b. plants get their food from the soil
c. plants absorb most of their food through their roots in the form of
minerals from the soil
d. plants do photosynthesis to make their own food
,e. plants get most of their food by absorbing water from the soil - 🧠
ANSWER ✔✔plants do photosynthesis to make their own food
In the 1600s, Jean Baptiste van Helmont conducted a five year willow tree
experiment in which he measured the weight of the tree and the weight of
the soil at the beginning of the experiment. What can you conclude from
the evidence he collected from this experiment?
a. soil does not contribute much mass to the mass of the tree
b. the mass of the tree came from carbon dioxide
c. the mass of the tree came mostly from water
d. the mass of the tree does not change when a plant grows
e. soil contributes important things to plant growth - 🧠 ANSWER ✔✔soil
does not contribute much mass to the mass of the tree
a mature tree can have a DRY MASS of 1 ton or more (after removing all
water), yet it starts from a seed that weighs less than 1 gram. Which of the
following contributes the MOST DRY MASS to this huge increase in
biomass?
a. absorption of organic substances from the soil via roots
b. absorption of mineral substances from the soil via roots
, c. incorporation of carbon dioxide from the air into molecules by green
leaves
d. incorporation of water from the soil into molecules by green leaves
e. absorption of sunlight energy into green leaves - 🧠 ANSWER
✔✔incorporation of carbon dioxide from the air into molecules by green
leaves
When biologists refer to "organic molecules", they are talking about
molecules that...
a. are made of proteins
b. are made of nucleotides
c. are not treated with pesticides
d. contain carbon atoms and are normally found in living things
e. contain DNA
f. contain oxygen atoms and are normally found in living things - 🧠
ANSWER ✔✔contain carbon atoms and are normally found in living things
Which of the following statements about how minerals contribute to the
DRY MASS of a tree is most scientifically accurate?
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STATEMENT. ALL RIGHTS RESERVED
3
Questions and Verified Answers |
Already Graded A+
Which of the following statements about how plants get their food is most
scientifically accurate?
a. plants absorb organic substances from the soil
b. plants get their food from the soil
c. plants absorb most of their food through their roots in the form of
minerals from the soil
d. plants do photosynthesis to make their own food
,e. plants get most of their food by absorbing water from the soil - 🧠
ANSWER ✔✔plants do photosynthesis to make their own food
In the 1600s, Jean Baptiste van Helmont conducted a five year willow tree
experiment in which he measured the weight of the tree and the weight of
the soil at the beginning of the experiment. What can you conclude from
the evidence he collected from this experiment?
a. soil does not contribute much mass to the mass of the tree
b. the mass of the tree came from carbon dioxide
c. the mass of the tree came mostly from water
d. the mass of the tree does not change when a plant grows
e. soil contributes important things to plant growth - 🧠 ANSWER ✔✔soil
does not contribute much mass to the mass of the tree
a mature tree can have a DRY MASS of 1 ton or more (after removing all
water), yet it starts from a seed that weighs less than 1 gram. Which of the
following contributes the MOST DRY MASS to this huge increase in
biomass?
a. absorption of organic substances from the soil via roots
b. absorption of mineral substances from the soil via roots
, c. incorporation of carbon dioxide from the air into molecules by green
leaves
d. incorporation of water from the soil into molecules by green leaves
e. absorption of sunlight energy into green leaves - 🧠 ANSWER
✔✔incorporation of carbon dioxide from the air into molecules by green
leaves
When biologists refer to "organic molecules", they are talking about
molecules that...
a. are made of proteins
b. are made of nucleotides
c. are not treated with pesticides
d. contain carbon atoms and are normally found in living things
e. contain DNA
f. contain oxygen atoms and are normally found in living things - 🧠
ANSWER ✔✔contain carbon atoms and are normally found in living things
Which of the following statements about how minerals contribute to the
DRY MASS of a tree is most scientifically accurate?
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
