Activity 2 Natural Selection by Evolution

Question 1

It refers to the movement of one representative organism that carries a particular gene to another set of population of the same species and interbreed with them. It is also re-introduces new genetic variation into a population and can also help to prevent populations from becoming genetically distinct from one another.

Answer 1

Gene flow

Question 2

It refers to the isolation of a fewer population from the bigger population that causes certain alleles to become more or less common in a population and this could lead to the loss of genetic variation within a population.

Answer 2

Genetic Drift

Question 3

It refers to the changes in the DNA sequence. It is one of the sources of variation among the species.

Answer 3

Mutation

Question 4

when nature favors the average traits in a group of living things. This means that living things with traits that are too different from the average are less likely to survive and have babies. Over time, more and more living things in the group will have the average traits.

Answer 4

Stabilizing selection

Question 5

a process in which when the environment changes the organisms naturally changes its physical attributes or behavioral attributes as an adaptation in response to that change. Those organisms that are able to adapt survived, but those that cannot adapt, died.

Answer 5

Natural selection

Question 6

when nature favors one extreme trait in a group of living things. This means that living things with traits that are closer to that extreme are more likely to survive and have babies. Over time, more and more living things in the group will have the favored extreme trait.

Answer 6

Direction selection

Question 7

an evolutionary force that drives a population apart. The — will cause organisms with intermediate traits to reproduce less, and will allow those organisms with extreme traits to reproduce more

Answer 7

Disruptive selection

Question 8

This causes reduction in genetic variation because a small group of organism establish new colony, leaving their main population. Since there is a small group that isolates from the varied genes of the population, there is also a lesser options in their mating partner. This continued to reduce until all of them are all relative or have identical gene type.

Answer 8

Founder effect

Question 9

In here, there is a sharp reduction in population size of a specie that may be due to natural disasters. This eliminates most of the species in a population leaving a small group of survivors. Although they are randomly selected, as the time goes on, since they are small group of organisms, their genetic make-up will likely to get unvaried.

Answer 9

Bottle neck effect

Question 10

It refers to the moving of organism from one place to another.

Answer 10

Migration

Question 11

It refers to the moving of habitat permanently of a specie from one place to another.

Answer 11

Emigration

Question 12

Mimicry is when an organism looks like another organism or resembles something else. This can happen between different species of living things or between living things of the same species. Mimicry can help living things survive by deceiving others just like in prey and predator relations.

Answer 12

Mimicry

Question 13

Endemic species are those plants and animals that exist only in one particular geographical region. Species can be endemic to large or small areas of the world such as endemic to a single continent, endemic to a country, endemic to a city.

Answer 13

Endemic species

Question 14

refers to the termination or dying of the last kind of a specie leaving no other species like that exist for the next generations.

Answer 14

Extinction