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TLS Online TPP Program

#Question id: 4944

What is true of the amino acids that might have been delivered to Earth within carbonaceous chondrites?

#Section 2: Evolution

  1. They had the same proportion of L and D isomers as Earth does today.

  2. The proportion of the amino acids was similar to those produced in the Miller-Urey experiment.

  3. There were fewer kinds of amino acids on the chondrites than are found in living organisms today.

  4. They were delivered in the form of polypeptides.

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TLS Online TPP Program

#Question id: 12285

#Section 1: Ecology

The principle of competitive exclusion states that
TLS Online TPP Program

#Question id: 10241

#Section 1: Ecology

In an Asian rice paddy, carp eat decaying material from around the base of rice plants while a snail scrapes algae from the leaves, stems, and roots of the same plant. They can survive at the same time in the same rice paddy because they
TLS Online TPP Program

#Question id: 8290

#Section 2: Evolution

If, someday, an archaean cell is discovered whose rRNA sequence is more similar to that of humans than the sequence of mouse rRNA is to that of humans, the best explanation for this apparent discrepancy would be ________.
TLS Online TPP Program

#Question id: 12353

#Section 1: Ecology

The number of individuals per unit area determines the population's
TLS Online TPP Program

#Question id: 11361

#Section 4: Behavioural Ecology

Which of the following tends to stabilize predator-prey relationships?