Adaption is a process where an organism becomes better suited to its environment.
100
Fill in the blank: The process of mating a labrador retriever and a poodle to produce labradoodle is called _______.
Selective Breeding
100
What is extinction?
The disappearance of all members of a species in all habitats.
100
What are two characteristics of asexual reproduction?
Any of the answers below is accepted:
* Only one parent is needed
* Offspring are identical to the parent
* Reproduction happens quickly
200
Fill in the blank: Mutations are ________ harmful.
1. always
2. sometimes
3. never
2. sometimes
200
What process causes organisms that are not fit for their environment to go extinct?
Natural Selection
200
Fill in the blank: Taking a DNA from a fish and inserting it into a tomato to make it last longer in the cold is called ______.
Genetic Engineering
200
Why did dinosaurs go extinct?
Change in climate.
200
If a baby goat receives a dominant gene for curly hair from one parent, and a recessive gene for straight hair from the other, which trait will the baby goat display?
The baby goat will have curly hair because the dominant gene will overpower the recessive gene.
300
True or False: All mutations are passed on to the offspring.
False
300
If a bird needs to be able to swim well in the water to catch fish to eat, what would its feet look like?
The bird's feet would be webbed. This is an adaptation that helps birds swim.
300
Which organism is able to evolve the quickest? Why?
1. housefly
2. cat
3. dog
4. human
1. housefly - Houseflies reproduce quickly, which allows them to adapt and evolve quickly.
300
Why is the bald eagle endangered?
Humans used DDT (pesticide), which leaked into lakes and poisoned the fish. Bald eagles that ate the fish laid eggs with soft shells and their offspring couldn't survive.
300
How many genes do humans have?
25,000 to 30,000
400
Which process gives rise to a variety of traits within a species?
Sexual Reproduction
400
In polluted areas where trees are covered in soot, which would survive better - dark or white moths? Why?
Dark moths - The dark color is an adaptation that allows dark moths to camouflage and avoid being caught by predators.
400
Fill in the blank: In order for species to survive natural selection, they must _________.
Adapt or Evolve
400
Give two reasons why species go extinct.
Any two answers from below are accepted:
* Increased predators / Decreased survival
* Habitat destruction
* Climate change
* Loss of food
400
The allele for blue eyes, b, is recessive. The allele for brown eyes, B, is dominant. If a child had the genotype Bb, what color eyes would she have? Why?
The child has one dominant allele B and one recessive allele b. Since the dominant allele overpowers the recessive allele, the child will have brown eyes.
500
What is one advantage of sexual reproduction?
It creates variety because offspring are not identical to their parents.
500
Name one adaptation that polar bears have to help them survive in the North Pole.
Any of the answers below are accepted.
* FUR: their thick fur keeps them warm in cold air and water (it's actually hollow)
* WHITE FUR: actually transparent, for camouflage in ice and snow
* PAWS: the pads provide traction on ice and are broad for use in swimming
* CLAWS: are curved to dig through ice
* EARS and TAILS: are short to minimize heat loss
* TEETH: more jagged than most bears, suiting a carnivore
* FAT LAYERS: keeps them warm (insulates)
500
The effects of natural selection are generally seen most quickly in which organism?
1. bacteria
2. plants
3. insects
4. animals
1. bacteria
500
Extinction is likely to occur when there is
1. A new source of food
2. An overabundance of trees
3. Use of pesticides in the forest
4. An increase in the population of insects
3. Use of pesticides in the forest
500
Which of the following is in the correct order from the smallest to the largest?
1. chromosome, DNA, cell, nucleus
2. gene, DNA, nucleus, cell
3. DNA, chromosome, cell, nucleus
4. chromosome, gene, nucleus, cell