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Brooks Biodiversity Unit 1 Exam questions and answers 2025(graded A+).

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Brooks Biodiversity Unit 1
Exam questions and answers
2025(graded A+)
evolution - answer the concept that all given organisms are related to
each other though common ancestry

Have scientists proven that life exists? - answer No

Big Bang - answer Theory of how the universe formed 16-18 billion years
ago

Symbiosis - answer the interaction between two different organisms living
in close association
"life coming together"

Spontaneous Generation - answer Theory that life arose spontaneously
from inanimate matter. Not a widely held belief among scientists

Biogenesis Hypothesis - answer Theory that living matter created by pre-
existing living matter

Haldane-Oparin Hypothesis - answer "Chemical Evolution"
Life arose spontaneously from early atmospheric compounds. It was
believed that the early atmosphere contained methane, ammonia, and
water. When combined with energy sources, life arose. This is the original
theory of how life arose, but is likely INCORRECT.

Miller-Urey Experiment - answer Tested the Haldane-Oparin Hypothesis by
conducting an experiment that simulated the conditions thought at the
time to be present on earth, and tested for the occurrence of chemical

, origins of life. They took inorganic compounds and made organic
compounds (mostly amino acids). DID NOT PROVE ANYTHING

Panspermia - answer Hypothesis that organic molecules were brought to
earth by meteorites/asteroids. Basically, life was seeded from outer space,
and that life exists throughout the universe distributed by meteoroids,
asteroids, comets, and planetoids.

Modern Theory of How Life Arose - answer (STILL NOT PROVEN, ONLY
LIKELY) life arose spontaneously from simple molecules (CO, CO2, N2,H2
(very little because it was in little abundance), and H2O), then combined
into larger, complex macromolecules such as proteins, carbohydrates,
lipids, and nucleic acids. (NOT from methane, ammonia, and water as
Haldane-Oparin hypothesized)

Primordial Soup Hypothesis - answer Hypothesized that the first
organisms were heterotrophs because they consumed the abundant food
molecules present in the atmosphere

The Cell - answer the basic form of an entity

The Cell Theory - answer every life form (from bacteria to humans) is
made up of/comes from cells

Steps of the development of cells - answer 1. Spontaneous formation of
simple molecules (Carbohydrates, lipids, proteins, and nucleic acids)
2. Formation of lipid bilayer, polymers, and Protien-RNA systems.
3. Lipid Bilayer forms selectively permeable barrier that contains an
enclosed self-replicating system. Closed system contains DNA, RNA,
proteins, and enzymes. (VERY IMPORTANT!)
4. Abiotic (derived from non-living things) formation of protobiont (initial
structures during the origin of life which can show at least one propery of
life) using self-replicating molecules
5. Composition of anaerobic prokayotic cells, then followed by aerobic and
photosynthetic prokaryotic cells
6. Single celled eukaryotic cells form and then evolve into multicellular
organisms

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