CELS-2-hard – Churner

Churner

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Which of the following best explains why Archaea are more closely related to Eukarya?

Archaea and Eukarya both have a nuclear envelope

Archaea and Eukarya both have membrane-bound organelles

Both Archaea and Eukarya contain peptidoglycan

The ribosomal RNA (rRNA) sequences of Archaea are more similar to Eukarya

None

Which of the following statements about the tree of life is considered to be true?

The three domains evolved independently

All life shares a common ancestor

Eukaryotes evolved directly from archaea

Bacteria and eukaryotes are closely related

None

Homeostasis refers to:

The ability of organisms to evolve

The transfer of genetic information

The process by which organisms maintain stability

The ability of an organism to reproduce

None

Which of the following is true regarding the earliest evidence of life?

Eukaryotic cells were first

Microfossils resemble bacteria over 3 billion years old

Life first appeared on land

The oldest fossils are 750 million years old

None

Which of the following characteristics is unique to the domain Archaea?

Ability of some species to grow at temperatures above 100°C

Presence of peptidoglycan in the cell wall

Presence of a nuclear envelope

Presence of membrane-bound organelles in most organisms

None

Which of the following statements about metabolism is correct?

It only applies to multicellular organisms

It is the process by which organisms acquire energy

It does not require enzymes

It is exclusive to eukaryotic cells

None

Which of the following structures is the smallest in size?

Bacterial cell

Ribosome

Nucleus

Mitochondrion

None

The RNA world hypothesis suggests that:

DNA evolved before RNA

Proteins alone were sufficient for early life

RNA was the first self-replicating molecule

RNA is less stable than DNA

None

Which of the following is the best definition of life?

An entity that has metabolism and is visible to the naked eye

A system capable of growth, reproduction, and response to stimuli

Any entity that moves and breathes

Any organism that contains DNA

None

10.

The size of most eukaryotic cells falls within which range?

1-10 mm

10-100 µm

100-1000 µm

1-10 nm

None

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