Fossil Prokaryotes Resemble Modern Rod-Shaped Bacteria

question 239

Multiple Choice

Fossil prokaryotes resemble modern rod-shaped bacteria.What appears to be a first step in the evolution of the modern eukaryote cell from a prokaryote ancestor?

• A) Formation of a nuclear envelope
• B) Endosymbiosis resulting in acquisition of a mitochondrion
• C) Loss of the stiff cell wall of bacteria
• D) Development of organelles studded with ribosomes
• E) Endosymbiosis resulting in acquisition of a chloroplast

Understand the concept of public goods and the rationale behind government provision of certain goods and services.

Analyze the role of household production in the economy and the factors influencing it.

Identify and explain the reasons for government intervention in the economy, including the provision of public goods, enforcement of contracts, and antitrust laws.

Distinguish between different organizational structures such as producer cooperatives and not-for-profit organizations.

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Definitions:

Primary Reinforcer

A stimulus that satisfies a biological need, inherently reinforcing without prior learning.

Antecedent

An event, condition, or stimulus that precedes a behavior or response, often influencing or triggering it.

Extinction

In psychology, extinction is the process by which a conditioned response decreases or disappears after repeated presentations without the unconditioned stimulus.

Positive Reinforcer

A stimulus that increases the probability of a behavior being repeated by providing a rewarding outcome.