Which of the Following Is a Highly Speculative Issue About

question 4

Multiple Choice

Which of the following is a highly speculative issue about the early origin of life?

• A) Sufficient evidence exists that RNA might have been the first informational molecule.
• B) Amino acids could have originated by Krebs cycle acids complexed to a dinucleotide.
• C) Bacterial redox metabolism can be evidenced through 34S/32S ratios from 3.47 Gyr ago.
• D) Ancestors of methanogens using H₂ and CO₂ to make CH4 and H₂O evolved early.
• E) Panspermia, life forms originated elsewhere, were seeded on Earth by meteorites.

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Definitions:

Drive Reduction Theory

A theory in psychology that explains motivation as being rooted in the desire to reduce internal tensions caused by unmet biological needs.

Erikson's Psychosocial

Refers to Erik Erikson's theory which includes eight stages of human development, each characterized by a central psychosocial conflict that shapes an individual's personality.

Drive Reduction

A theory in psychology that motivation arises from the body's attempt to reduce the state of tension caused by unmet biological needs.

Wire and Cloth

A reference to a set of classic experiments in developmental psychology, often associated with attachment theory, where baby monkeys showed preference for cloth surrogate mothers over wire ones, despite the wire mothers providing food.