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WorksheetsUNIT 7 NATURAL SELECTION
Total questions: 24
Worksheet time: 12mins
What is natural selection?
Naturally selecting organisms that do not adapt to environments
Organisms that have no chance at survival and/or reproduction in a particular environment
Organisms that will not have adaptations passing throughout generations
Process by which organisms have adaptations suited for certain environments, they have a greater chance of survival/reproduction, and these adaptations can pass through generations.
Changes in what makes a mutation?
Protein
tRNA
DNA
rRNA
Where do the changes in mutation happen?
Genotype
Phenotype
Cytoplasm
Mitochondria
What is convergent evolution?
The process by which similar environmental conditions select for similar traits in different populations or different species over time
The process by which humans select desirable traits in other species and selectively breed individuals with the desired traits
Similar traits that can be observed in distantly related or unrelated species
The genotypic and phenotypic differences between individuals in a population
Does evolution have anything to do with natural selection?
Yes
No
Who developed the theory of natural selection?
Gregor Mendel
Elizabeth Hines
Charles Darwin
Thomas Dwindle
When there are limited resources, what do organisms do with each other?
Share with each other
Help each other
Compete with each other
Rationalize
What is a variation in a population?
Traits that reduce the chance of survival
Traits that increase the chance of survival
Creation of new species
Different combinations of alleles (genotypes) and phenotypes
Evolutionary fitness is measured by reproductive success. What is fitness?
An organism's ability to survive and exercise throughout its lifetime
An organism's ability to survive and produce fertile offspring
The process by which female organisms fight for males to reproduce
Organisms being able to be physically fit and passing this trait throughout generations
The evolution of one species into two or more species is a result of populations becoming more diverse and isolated is
Adaptive radiation
Creationism
Variation in fitness
Hereditary
What is mechanical isolation?
Sperm of one species may not be able to fertilize the eggs of another species
Reproductive structural differences prevent successful mating and reproduction
Species have different courtship behaviors or mate preferences
Species breed during different times of day, seasons, or years
What is allopatric speciation?
The evolution of new species due to individuals from the same population being geographically isolated over a long period of time
The evolution of a new species due to individuals being reproductively isolated from a surviving ancestral population
Evolution that occurs rapidly after a long period of stasis
Evolution that occurs slowly over hundreds of thousands or millions of years
What describes the genotypic and phenotypic differences between individuals in a population?
Variation in Populations
Phenotype variations
Genetic variation
Survival of organisms
Which determines the traits that will be passed down in generations with the highest frequency?
Mendelian genetics
Random mutations
Non-random mutations
The fit of the trait to the environment
A mutation is a random change in an organism's genome-- what can it do?
Provides new genotypes that contribute to evolution by natural selection
Can alter a DNA sequence
Can contribute to changes in the genetic makeup of a population over time
Provides new phenotypes that contribute to evolution by natural selection
Creates genetic variation within a population
What is the Hardy-Weinberg model?
A model explaining how organisms reproduce e
Model showing a relationship between fitness and DNA
Model with an equation that determines the number of organisms in a population
Model that describes and predicts allele frequencies in a nonevolving population
What are variations in a structure that was present in a common ancestor?
Homologous Structures
Vestigial structures
Analogous structures
Quaternary structure
What are reduced or obsolete features that serve little or no purpose for an organism?
Vestigial Structures
Homologous Structures
Analogous structures
Tertiary structures
What are structures that evolved independently in different species due to similar environmental conditions/selective pressures. ?
Homologous structures
Secondary structures
Analogous structures
Vetsugal structures
What is a phylogenetic tree?
Explains different DNA structures
Models amount of generations
Diagram showing evolutionary relationships amongst species
Tree showcasing different organisms in a population
An adaptation is an inherited characteristic that can be?
Physical/behavioral
Physical/geographical
What is extinction?
The growth of a species
The movement of a species from one place to another due to changes in environmental conditions.
The disappearance of a species, such that no new generations will naturally populate the earth.
Traits that reduce the rates of survival are
Genes
Deleterious traits
Adaptive traits
Traits that increase the rates of survival are
Adaptive traits
Alleles
Phenotypes
