Evolution

Which of the following is a Post-Zygotic Isolating mechanism?

• Behavioral Isolation

• Mechanical Isolation

• Reduced Hybrid Fertility

• Habitat Isolation

Answer explanation

Behavioral, Habitat, Temporal, Mechanical, and Gametic isolation are all PRE-Zygotic.

They prevent fertilization from ever occurring.

Reduced Hybrid Fertility and Viability both occur after successful fertilization, but prevent the offspring from having their own offspring.

Which of the following are PRE-Zygotic Isolating mechanisms (select all that apply)?

• Behavioral Isolation

• Mechanical Isolation

• Reduced Hybrid Fertility

• Habitat Isolation

Answer explanation

Behavioral, Habitat, Temporal, Mechanical, and Gametic isolation are all PRE-Zygotic.

They prevent fertilization from ever occurring.

Reduced Hybrid Fertility and Viability both occur after successful fertilization, but prevent the offspring from having their own offspring.

An organism can evolve in its lifetime.

• True

• False

Answer explanation

Individuals do not evolve, they do not change their genetics to acquire new traits.

Populations CAN evolve. New traits can be brought into future generations from new mutations, and other traits may become less common.

Populations can evolve from generation to generation.

• True

• False

Answer explanation

Individuals do not evolve, they do not change their genetics to acquire new traits.

Populations CAN evolve. New traits can be brought into future generations from new mutations, and other traits may become less common.

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An individual's ability to survive and reproduce is called...

• Fitness

• Evolution

• Artificial Selection

Answer explanation

Biological Fitness is all about surviving to reproduce. You can have high fitness for one environment and low fitness for another!

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Alleles becoming less or more common from one generation to the next is...

• Fitness

• Evolution

• Artificial Selection

Answer explanation

This is a modern definition of evolution.

While evolution does not require speciation (new species) to occur, it can lead to it!

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To which Kingdom do humans, dogs, and snakes belong?

• Animalia

• Plantae

• Fungi

• Protista

Answer explanation

Yep, even humans are animals.

We certainly aren't plants, fungi, or protists, are we?

Which organisms were most likely the first to exist?

• Bacteria

• Humans

• Plants

• Dinosaurs

Answer explanation

The oldest fossils of organisms found to-date are of bacteria (prokaryotes)!

Which of these scientific names are correctly written (they should also be italicized)?

• Homo Sapiens

• Homo sapiens

• homo sapiens

• homo Sapiens

Which two taxonomic ranks make up an organism's scientific name?

• Domain and Kingdom

• Kingdom and Class

• Family and Genus

• Genus and Species