Question

Which is most likely a source of air pollution?
littering
CFCs
oil spill
runoff
Fossils show how the complexity of living organisms has changed over time. Gerobatrachus hottoni was a unique organism that lived during the Permian period between ancient salamanders and ancient frogs. Scientists have nicknamed this organism the “frogamander” because it is believed to be a common ancestor of both modern frogs and salamanders.

A frogamander.

Which type of fossil is Gerobatrachus hottoni most likely to be?
intermediary
phylogenic
transitional
index
Which best describes an adaptation that could be found in a fish that lives in a slow-flowing stream?

the ability to attract prey by glowing
extra gills, for oxygen extraction
the ability to grow larger
extra fat, for warmth
hich statement correctly describes the electrons in a water molecule?
Electrons are pulled closer to the hydrogen atoms.
Electrons are pulled closer to the oxygen atom.
Electrons are located inside the nucleus of the hydrogen atoms.
Electrons are located inside the nucleus of the oxygen atoms.
andas eat bamboo for energy. What are pandas?
producers
consumers
decomposers
autotrophs
Which of the following is an example of adaptive radiation?
One population of squirrels becomes two separate species over a long time.
One population of lizards forms 15 separate species over a short time.
One species of birds becomes better suited to its environment over time.
One species of fish forms when two species of fish begin to breed with each other.
Why is water considered to be abiotic?
because it is not part of the biosphere
because it came from something living
because it is dead
because it is not living and never lived
A disease-causing bacteria successfully enters your body, making it past the first and second lines of defense. Which barrier will then act on the bacteria?
chemical
physical
biological
electrical
When the body receives stimuli, which structure typically processes the stimuli?
sensory nerve cell
motor nerve cell
brain
meninges
While walking to the kitchen in the middle of the night, Jamal tripped over an object that he could not see in the dark. Which part of the CNS sent a signal to help prevent Jamal from falling?
cerebrum
hippocampus
cerebellum
brain stem

Answer 1

1) Which is most likely a source of air pollution?
Answer: CFCs — they are gaseous pollutants that affect the atmosphere (e.g., ozone depletion).

2) Gerobatrachus hottoni fossil type?
Answer: transitional — it shows features intermediate between frogs and salamanders.

3) Best describes an adaptation for a fish in a slow-flowing stream?
Answer: extra gills, for oxygen extraction — slow water can be lower in dissolved oxygen.

4) Which statement correctly describes the electrons in a water molecule?
Answer: Electrons are pulled closer to the oxygen atom — oxygen is more electronegative.

5) Pandas eat bamboo for energy. What are pandas?
Answer: consumers — they obtain energy by eating other organisms.

6) Which is an example of adaptive radiation?
Answer: One population of lizards forms 15 separate species over a short time — rapid diversification into many species.

7) Why is water considered abiotic?
Answer: because it is not living and never lived — abiotic = nonliving component.

8) A disease-causing bacteria gets past the first and second lines of defense. Which barrier will then act?
Answer: biological — the third line (adaptive immunity: B cells, T cells, antibodies).

9) When the body receives stimuli, which structure typically processes the stimuli?
Answer: brain — it processes sensory input and coordinates responses.

10) Which part of the CNS sent a signal to help prevent Jamal from falling?
Answer: cerebellum — it coordinates balance and posture.