N5 3.6 Evolution of Species

What effects can mutations have on survival?

• they are always advantageous

• they are always neutral

• they are always disadvantageous

• they can be neutral, advantageous, or disadvantageous

Which organisms are most likely to survive according to the concept of Natural Selection?

• The organisms that are the least adapted to the environment.

• The organisms that reproduce the most.

• The organisms that are the best at competing for resources.

In a population, mutations are the only source of...?

• New species

• New alleles

• New individuals

• New environments

What are different versions of the same gene called?

• Chromosomes

• Alleles

• Proteins

Sections of DNA are known as .

• Chromosomes
• Genes
• mRNA
• Proteins

What do advantageous mutations give the organism?

• A harmful characteristic

• A beneficial characteristic

• A neutral characteristic

• No change at all

What is isolation in the context of speciation?

• When one population of a species is separated by an isolation barrier

• The development of similar traits in unrelated species

• The movement of individuals from one habitat to another

Where is DNA found inside a cell?

• Cytoplasm
• Mitochondria
• Nucleus
• Cell membrane

What is an example of an ecological isolation barrier?

• pH

• Courtship behaviour

• Mountains

What are selection pressures?

• Factors that increase an organism's ability to reproduce

• Factors that affect an organism's ability to survive in a given environment

• Factors that ensure an organism's genes are passed to the next generation