- Proteins were the first self-replicating molecules.
- RNA molecules could have performed both informational and catalytic roles in early life.
- DNA is more stable than RNA.
- Coacervates were the first living cells.
Category: Biology etea medical mcqs
- Individual insects become resistant by adapting to the pesticide.
- The pesticide causes beneficial mutations for resistance.
- Insects with pre-existing genetic resistance survive and reproduce, increasing the resistant gene frequency.
- Resistant insects migrate into the population from elsewhere.
- How individuals adapt to their environment during their lifetime.
- The inheritance of acquired traits.
- How populations change over successive generations due to differential survival and reproduction.
- The sudden appearance of new species without prior ancestors.
- Are physically strongest.
- Have the longest lifespan.
- Produce the most viable offspring.
- Consume the most resources.
- Random mutations leading to eye reduction.
- Disuse of eyes in a dark environment leading to their degeneration and inheritance of this trait.
- Survival advantage of blind fish.
- Genetic drift in a small population.
- Random variation.
- Directed evolution.
- Natural selection.
- Genetic mutation.
- A flask representing the primordial ocean.
- Electrodes to simulate lightning.
- A chamber simulating early Earth's atmosphere.
- A chamber containing pre-formed proteins.
- Heterotrophic metabolism.
- Anaerobic respiration.
- Autotrophic metabolism.
- Sexual reproduction.
- Polymerization.
- Hydrolysis.
- Depolymerization.
- Catabolism.
- Environmental influence on organisms.
- The inheritance of germline mutations.
- The transmission of somatic changes to the germline.
- The existence of extinct species.
- Is essential for the formation of amino acids.
- Would have reacted with and destroyed early organic molecules.
- Accelerates the polymerization of simple organic compounds.
- Promotes the spontaneous generation of complex life.
- All bacteria would develop resistance through continuous exposure.
- The non-resistant bacteria would acquire resistance and pass it on.
- The resistant bacteria would survive and reproduce more, increasing the frequency of the resistance gene.
- The heavy metal would directly mutate non-resistant bacteria into resistant ones.
- All members of a beetle species having the same wing pattern.
- A population of deer exhibiting different running speeds.
- A species of plant always producing identical seeds.
- Identical twins growing to different heights due to diet.
- Variation.
- Natural selection.
- Struggle for existence.
- Overproduction.
- Inherit a predisposition for musical talent.
- Be born with naturally more agile fingers.
- Develop similar dexterity only with intensive practice.
- Show no inherited physical advantage for piano playing.
- The presence of RNA in all modern organisms.
- RNA's ability to self-replicate and act as an enzyme (ribozyme).
- The fact that DNA is more stable than RNA.
- The discovery of complex proteins in early life forms.
- Puppies would be born with shorter tails.
- Puppies would be born without tails.
- Puppies would be born with normal tail length.
- Puppies would develop stronger muscles from carrying smaller tails.
- A fully developed nucleus.
- Limited self-replication and metabolism.
- Complex multicellularity.
- The ability to perform sexual reproduction.
- Volcanic activity.
- Deep-sea hydrothermal vents.
- Photosynthetic organisms.
- Formation of the ozone layer.
