Biology JLAB 2024/2025 Exam
Questions with 100% Correct Answers |
Latest Update
Ascidians are sac-like marine organisms. Their larvae have well-developed
brains and dorsal nerve cords. This suggests that ascidians should be
classified with the - - 🧠ANSWER ✔✔chordates
In order to maintain homeostasis, it is most important for an animal to be
able to - - 🧠ANSWER ✔✔respond to its environment
A scientist develops a hypothesis, designs an experiment, and obtains data
that support her hypothesis. Which of the following best describes when a
hypothesis becomes a theory? - 🧠ANSWER ✔✔When it is supported by
consistent data from many experimental trials
Which of these is a decomposer in a Virginia forest? - 🧠ANSWER ✔✔a
mushroom
According to the classification key, what is the genus and species of this
organism? - 🧠ANSWER ✔✔Eurytides marcellus
1
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STATEMENT. ALL RIGHTS RESERVED
,A population of mice is evenly divided into two groups, and each group is
placed on an isolated island with no existing mouse population. Which
statement best explains the difference in the mouse populations on Island
A and Island B at the end of the 20 years? - 🧠ANSWER ✔✔Conditions on
Island B favored the brown-furred individuals,
while both fur colors were evenly advantaged on Island A.
Lamarck was an early scientist who
studied the development of characteristics in
organisms over time. Which of the following
choices best describes his views on how
organisms change over time? - 🧠ANSWER ✔✔Theory of acquired
characteristics
A certain virus causes a disease of the
digestive system. What is the most likely source of
this virus? - 🧠ANSWER ✔✔water
Based on this classification scheme, the European otter and the leopard
are in
2
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STATEMENT. ALL RIGHTS RESERVED
, the same — - 🧠ANSWER ✔✔order but different families
Which area of the leaf is most
responsible for protecting the leaf from the
drying effects of the air? - 🧠ANSWER ✔✔the cuticle
According to the data in the graph,
during which time period did the overall bluegill
population decline? - 🧠ANSWER ✔✔1996-1999
The picture shows the trachea and
surrounding tissue of a flea. Which of these
best describes the shape of the flea trachea? - 🧠ANSWER ✔✔a long,
branched tube
The organisms at the beginning of the food chain are - - 🧠ANSWER
✔✔producers
Two plants are crossed, and the traits of height and color are assessed in
the offspring. The following cross was conducted: TTPP × ttpp.
T = dominant allele for height, tall plant
3
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
Questions with 100% Correct Answers |
Latest Update
Ascidians are sac-like marine organisms. Their larvae have well-developed
brains and dorsal nerve cords. This suggests that ascidians should be
classified with the - - 🧠ANSWER ✔✔chordates
In order to maintain homeostasis, it is most important for an animal to be
able to - - 🧠ANSWER ✔✔respond to its environment
A scientist develops a hypothesis, designs an experiment, and obtains data
that support her hypothesis. Which of the following best describes when a
hypothesis becomes a theory? - 🧠ANSWER ✔✔When it is supported by
consistent data from many experimental trials
Which of these is a decomposer in a Virginia forest? - 🧠ANSWER ✔✔a
mushroom
According to the classification key, what is the genus and species of this
organism? - 🧠ANSWER ✔✔Eurytides marcellus
1
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
,A population of mice is evenly divided into two groups, and each group is
placed on an isolated island with no existing mouse population. Which
statement best explains the difference in the mouse populations on Island
A and Island B at the end of the 20 years? - 🧠ANSWER ✔✔Conditions on
Island B favored the brown-furred individuals,
while both fur colors were evenly advantaged on Island A.
Lamarck was an early scientist who
studied the development of characteristics in
organisms over time. Which of the following
choices best describes his views on how
organisms change over time? - 🧠ANSWER ✔✔Theory of acquired
characteristics
A certain virus causes a disease of the
digestive system. What is the most likely source of
this virus? - 🧠ANSWER ✔✔water
Based on this classification scheme, the European otter and the leopard
are in
2
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
, the same — - 🧠ANSWER ✔✔order but different families
Which area of the leaf is most
responsible for protecting the leaf from the
drying effects of the air? - 🧠ANSWER ✔✔the cuticle
According to the data in the graph,
during which time period did the overall bluegill
population decline? - 🧠ANSWER ✔✔1996-1999
The picture shows the trachea and
surrounding tissue of a flea. Which of these
best describes the shape of the flea trachea? - 🧠ANSWER ✔✔a long,
branched tube
The organisms at the beginning of the food chain are - - 🧠ANSWER
✔✔producers
Two plants are crossed, and the traits of height and color are assessed in
the offspring. The following cross was conducted: TTPP × ttpp.
T = dominant allele for height, tall plant
3
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
