Already Passed Answers 2025-2026
Updated.
The first cells on earth were prokaryotic, _____ and _____. - Answer heterotrophic,
anaerobic
Living organisms possess a degree of organization and complexity in their structure. This refers
to the life characteristic of _____. - Answer Order
The unity of life is illustrated by the idea that all organisms - Answer evolved from a single
common ancestor
Where is the majority of ATP produced in a eukaryotic cell? - Answer Mitochondria
Number the following events to indicate the order in which they occurred. - Answer 1.
Animals first appeared on Earth
2.
The Cambrian Explosion
3.
The Permian Extinction
4.
Dinosaurs first appeared on Earth
5.
Mammals first appeared on Earth
6.
The Cretaceous Paleogene Extinction
When mitochondria became part of the eukaryotic cell, the cell became "rich" with ATP. This
lead to cell specialization. Cell specialization allowed - Answer The evolution of multicellular
organisms
To which kingdom would a multicellular, eukaryotic, photosynthetic organism belong? - Answer
plantae
Which pair of organelles is responsible for energy supply to eukaryotic cells? - Answer
chloroplasts and mitochondria
,Which is the highest level in the taxonomic organization? - Answer Domain
Which of the following is TRUE of ALL organisms? - Answer They obtain nutrients
Which organelle extracts energy from food molecules and stores it in the high-energy bonds of
ATP? - Answer mitochondrion
Living organisms must self-regulate their internal processes. Another term for self-regulation is
_____. - Answer homeostasis
In the nemonic King Philip did come over for gross spaghetti, Philip corresponds to - Answer
Phylum
Aerobic organisms use oxygen as the __________ - Answer Final electron acceptor
Stromatolites contain the fossils of the first _____ cells. - Answer photoautotrophic
Which organelles are thought to have originated via endosybiosis? - Answer Mitochondria
and Chloroplasts
The _____ in Earth's atomosphere is responsible for the formation of the ozone layer. - Answer
oxygen
Humans sweat when the temperature gets hot so that they can cool themselves. [Blank1] -
Answer Homeostasis
The Permian Extinction occurred after the Cambrian Explosion. - Answer True
The hereditary material that is present in all cells is - Answer DNA.
Which is a difference between prokaryotes and eukaryotes? - Answer Prokaryotes have a
nucleoid, eukaryotes have a nucleus.
The Bacteria and Eukarya domains are distinguished by - Answer the absence or presence of
organelles including a nucleus.
,first eukaryotic cells - Answer Proterozoic
the first cells - Answer Archean
oxygen entered the atmosphere - Answer Proterozoic
no life possible - Answer Hadean
Cambrian Explosion - Answer Phanerozoic
Ancient members of all Eukarya kingdoms appeared. - Answer Proterozoic
An extremophile would most likely be found - Answer in water from a hot spring
"Scientific names" contain the ___________ and the ___________ - Answer Genus and
species
The main difference between an autotroph and a heterotroph is - Answer how they obtain
energy.
The smallest unit of life is the ________. [Blank1] - Answer Cell
A simple food chain begins with the energy of the Sun. - Answer True
A ________ is a portion of DNA that resides at a particular locus or site on a chromosome and
encodes a particular function. [Blank1] - Answer Gene
Mitochondria are - Answer aerobic and produce ATP.
Aerobic heterotrophs combine oxygen with ______, to produce CO2, water and energy-carrying
molecules like ATP. - Answer carbohydrates
We use the scientific method every day. Imagine your car doesn't start one morning before
school. Which of these is a reasonable hypothesis regarding the problem? - Answer I'm out
of gas.
, There are very few laws, but many theories in biology. Why? - Answer A theory is supported
by repeated tests and by extensive evidence, but cannot be proven; laws must be proven to be
true.
Science is not: - Answer art
technology
interpretation of reality
individualistic
You are testing treatments for AIDS sufferers and find that 75% respond very well and 25% show
no improvement or decline in health after your experimental treatment. You should - Answer
review the results, modify the drug or the dosage, and repeat the experiment.
A good experiment should look at as many variables as possible. True or False? - Answer
False
Alexander Fleming observed a patch of mold that bacteria were not able to grow near. Which of
these was his hypothesis? - Answer The mold produced a substance that killed nearby
bacteria
Which of these would NOT be scientific - Answer use different tomatoes in spaghetti sauce
to determine which produces the best taste
To test the effect of vitamin D on growth, two groups of rats were raised under identical
conditions and fed the same diet, but one of the groups also received daily injections of vitamin
D. The injections of vitamin D in this experiment are considered the ________. [Blank1] -
Answer Variable
You are wondering whether a new type of chicken feed, Clucky-Doo, will increase egg
production by your flock of hens. You think, despite the ads you've seen on TV, that the new
chicken feed will have no effect on the egg production of your hens. You divide your flock of 100
hens into two groups of 50, group A and group B. Group A hens are fed the new type of chicken
feed (Clucky-Doo) while group B hens are fed the same feed you've been using for 10 years,
(Eggtastic). You keep track of how many eggs are produced by each group of hens. You find that
Clucky-Doo and Eggtastic produce identical egg production numbers in the two groups of hens.
You were right! Match each description below with the correct step of the scientific method. -
Answer B.
Perform an experiment
C.
Define a problem
A.