Keystone Biology Review

symbiotic relationship in which both organisms benefit

• competition
• Mutualism
• nitrogen fixation
• energy pyramid

Tags

NGSS.MS-LS2-2

What is the major difference between a community and an ecosystem? 

• A community involves only the biotic, not the abiotic
• An ecosystem only includes herbivores and carnivores-- no decomposers
• An ecosystem involves only the biotic, AND THE abiotic 
• An ecosystem is just a larger community

Which of the following is a biotic-biotic interaction?

• A snake warming itself on a sunny rock
• A rainstorm washing nutrients from the soil
• A human shivering because of cold weather
• a squirrel gathering acorns from an oak tree

Tags

NGSS.MS-LS2-2

Two organisms that are closely related would have

• very similar DNA sequence
• exactly the same DNA sequences
• no proteins in common
• completely different DNA sequence

Tags

NGSS.HS-LS3-1

NGSS.HS-LS4-1

When Hurricane Marilyn struck the Caribbean islands in 1995, a group of about 15 green iguanas floated on storm debris from the island of Guadeloupe to the island of Anguilla. No other iguanas lived on Anguilla. Because the iguanas are geographically isolated from others of their species, the iguanas will MOST LIKELY

• develop new traits.
• be unable to breed.
• be unable to survive.
• interbreed with other species.

Tags

NGSS.HS-LS4-1

NGSS.HS-LS4-2

NGSS.HS-LS4-4

The drastic reduction in genetic variation that results when a new, isolated population is established by a very small number of individuals from a larger population is known as

• the found effect.
• speciation.
• natural selection.
• gene flow.

ATTTGAGCC- Original
ATTGAGCC - Mutated
The example above is an example of a 

• Insertion- Frameshift
• Deletion- Substitution
• Deletion -Frameshift
• All of the above

Tags

NGSS.HS-LS3-2

Dr. Smith's parents have normal hearing. However, Dr. Smith has inherited a form of deafness. Deafness is a recessive trait that is associated with the abnormal allele (d). The allele associated with normal hearing is (D). Dr. Smith's parents could have which of the following genotypes?

• DD and dd
• dd and dd
• Dd and Dd
• DD and DD

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What percentage of the female offspring will be a carrier for this recessive disease?

• 0%
• 50%
• 100%
• 25%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which of the following is an example of homozygous dominant?

• Jj
• Rr
• MM
• ee