NS 201 Exam 1 (Questions)

What are the 3 main tenets of cell theory?

-All life is composed of at least one cell -Cells are the fundamental unit of organization -Cells can only come from preexisting cells by cell division

What is true about the MMWH?

-It diminishes researcher bias during data collection -It allows for the discovery of more than one cause for a particular phenomenon

What can cause a clumped distribution?

-Uneven distribution of food -Living in herds

What is a population?

A group of individual organisms of a species that live together in space and time

What type of population would be associated with a population pyramid that had an extremely broad base?

A rapidly expanding population

How would you define a scientific theory?

A set of mechanisms or principles that explain a major aspect of the natural world.

Following transcription, the DNA sequence GTTTCCCAACGA would produce which strand of mRNA?

CAAAGGGTTGCT

The number of individuals that a particular place can support indefinitely is called the

Carrying capacity

What are the three types of dispersion in a population?

Clumped, uniform, random

Which of the following would contribute to an increase in the growth of a population when there are abundant resources?

Decrease in generation time

When reproductive costs are high, reproduction _____ and individual lifespan _____.

Decreases; increases

When reproductive costs are high, reproduction _____ and individual lifespans _____.

Decreases; increases

True or false: A moderate amount of environmental resistance is incorporated into an exponential growth model.

False

True or false: A population's carrying capacity is a static measure

False

Which of the following factors does not affect population densities?

Generation time

How would a drought affect the carrying capacity of a population of geese?

It would decrease

r strategists tend to have:

Little parental care

What is true about a species with a type III survivorship?

Many offspring will be produced and most of them will die young

Which of the following factors does not affect population densities?

Mating ritual

The diploid chromosome number for the house fly is 12. Gametes in the house fly are produced through the process of __________ and contain ________ chromosomes.

Meiosis; 6

Exposure to high levels of radiation changed the DNA sequence of a somatic cell of an otter from GGTTACCT to GGATACCT. What type of mutation is this and how will it affect this otter's pup?

Point mutation; It will have no effect.

Recruitment of tRNA molecules to the ribosome most directly affects which level of protein organization?

Primary

A population with the following growth curve is likely to also have which of the following?

Short generation time

All of the mouse pups in a litter have extremely long tails. A third of the pumps have brown fur while the remainder of the pups have black fur. What might this tell us about the location of genes that encode for long tails and brown fur?

They are located far apart from one another on the same chromosome.

Gene expression involves the process of _________ to followed by ____________.

Transcription; translation

A cohort whose survivorship decreases steadily over time would be classified as which type?

Type II

How would you use the principle of geographic mosaic theory to examine how the uniforms of sports teams change over time? (think about cities with multiple sports teams of the same sport)

What drives a city to have more sports team? Big cities. Lots of people. One hockey team already there with set uniform, new team's uniform has to be different (not as distinguishable); the look of one team's uniform will spark a change in another one.

What are three differences between r-adapted populations and k-adapted populations?

r-like adaptations: -produce many offspring -few survive -small body size K-like adaptations: -produce few offspring -many survive -large body size