Forces of Evolution
Permanent change in an organism's DNA. Organism with gene mutation may not be able to have offspring with others of the same species.
Mutation
If we say a population of animals can be distributed in one of three basic patterns (uniform, random, clumped), what population characteristic are we discussing?
Population Pattern of Distribution
What is the process by genes for helpful traits are passed down to offspring?
Natural Selection
Biodiversity provides humans with food, building materials, fuels and ______
Medicine!
True of False?
Babies have around 100 more bones than adults.
TRUE!
Babies have about 300 bones at birth, with cartilage between many of them. This extra flexibility helps them pass through the birth canal and also allows for rapid growth. With age, many of the bones fuse, leaving 206 bones that make up an average adult skeleton.
Overproduction of offspring, variations, inheritance, and the advantages of specific traits in an environment (i.e.: giraffes with longer necks)
Natural Selection
"Make up" or composition of a population is what characteristic of a population?
Population Structure
Turtle population A cannot pull it's head and arms all the way into it's shell. Turtle population B of the same species has adapted to pull its neck and arms in farther. This adaptation makes it more difficult for predators to eat them. Which turtle population will be made extinct by natural selection?
Turtle population A
Biodiversity supports natural ecosystem services like...
Air and water purification OR Soil Renewal OR Decomposition of Waste OR Pollination
True or False?
Lizards are Endothermic, meaning they make their own heat energy.
False
Lizards are ectotherms and use behavioral adaptations to control their temperature. They regulate their behavior based on the temperature outside; if it is warm they will go outside up to a point and basking under the sun. If they get to hot they burrow or hide from the sun.
Gene Flow is...
The movement of genes across two different populations.
Summary of the number of individuals of each age in the population is what population characteristic?
Population Age
True or False?
Natural Selection benefits the environment.
TRUE
Tundra, Rainforest, Desert and Grasslands are all examples of...
Biomes
True or False?
Stomach acid is strong enough to dissolve stainless steel
True!
Your stomach digests food thanks to highly corrosive hydrochloric acid with a pH of 2 to 3. This acid also attacks your stomach lining, which protects itself by secreting an alkali bicarbonate solution. The lining still needs to be replaced continually, and it entirely renews itself every four days.
A whale species has been hunted to almost extinction. Only a few 100 are left in the population and the whales have been forced to inbreed. Th population of whales is getting smaller and smaller. What force of evolution is at work?
Genetic Drift
Number of individuals per unit geographic area is what population characteristic?
Population Density
Give an example of a adaptation in a species that could have been caused by natural selection. You must explain your answer.
Answers will Vary.
A variety of genes in a population is what type of diversity?
Genetic Diversity
True or False?
Polar bears are nearly undetectable by infrared cameras.
True!
Thermal cameras detect the heat lost by a subject as infrared, but polar bears are experts at conserving heat. The bears keep warm due to a thick layer of blubber under the skin. Add to this a dense fur coat and they can endure the chilliest Arctic day.
True or False?
Natural Selection reduces a region's biodiversity.
FALSE
Natural Selection improves and strengthens a region's biodiversity.
The number of individuals in a population is called...
Population Size
True or False?
Natural Selection helps save organisms in a population that have poor adaptive traits.
False
Natural selection = If you don't thrive you don't survive!
True of False?
Biodiversity hotspots have few species of animals and can easily be recreated if destroyed by humans.
FALSE
A biodiversity hotspot reservoir is a biologically rich region that is an irreplaceable of high diversity.
True or False?
Raccoons are more closely related to house cats than polar bears.
False!
Pandas, bears and raccoons are all mammals and they all share the same order (Carnivora).