Day 4_Semester 2_TEKs 7C/7D_DOL

Tall kelp have a distinct advantage over shorter kelp in receiving needed sunlight in their ocean environment

• directional selection

• disruptive selection

• stabilizing selection

• sexual selection

• artificial selection

Aspen trees that are over 25 m tend to blow over in high winds; aspen that are under 15 m don't get enough sun

• directional selection

• stabilizing selection

• disruptive selection

• artificial selection

• sexual selection

snails with a forward spiral and snails with a backward spiral have an advantage in their environment

• directional selection

• stabilizing selection

• disruptive selection

• artificial selection

• sexual selection

The small seeded plants in an area were killed by a fungus. Finches with a small beak cannot crack open the large seeds from the plants that were left. What type of selection is likely to occur?

• directional selection

• stabilizing selection

• disruptive selection

• artificial selection

A fire has wiped out the vegetation that produces medium sized seeds. As a result, the finches left can feed on seed that are available in two sizes: small and large. What type of selection is likely to take place in this population?

• directional selection

• disruptive selection

• stabilizing selection

• artificial selection

Male guppies found in areas without predators are more colorful than the ones found in locations with large predator populations. A population of adult guppies originating from an area with a large number of predators is transferred to a nearby area with few predators. Which of these is most likely to happen over a few generations?

• the mortality rate of the guppies will increase

• offspring will stop competing for resources

• there will be an increase in mutations in the offspring

• there will be an increase in the number of colorful guppies

The diagram shows light and dark-colored beetles that live on a tree. Which result is most likely to occur to the beetle population due to predation over time?

• the number of light-colored beetles in the population will increase

• there will be more dark-colored beetles than light-colored beetles

• the number of light-colored beetles will decrease

• the dark-colored beetles will move to a different type of tree

The quiver tree grows in desert areas in southern Africa. In recent decades average temperatures have been rising in southern Africa. Scientists predict that this warming trend will continue. Quiver trees in the hottest parts of their range near the equator are dying, but quiver trees at high elevations or in parts of the range that are farther from the equator are growing and reproducing. Which of these best explains what is happening to the quiver tree population in southern Africa?

• individual quiver trees are unable to adjust to the rising temperatures, and only those in cooler parts of the range will survive

• the quiver tree species is unable to survive rising temperatures throughout its range. The species is likely to undergo rapid extinction

• Individual quiver trees can quickly adapt to rising temperatures. Individual trees will change their method of seed dispersal in cooler parts of the range.

• The quiver tree species will survive by producing offspring suited for warmer temperatures

White-tailed deer are seasonal breeders. Female white-tailed deer begin their reproductive cycle in the fall. Rising testosterone levels in male white-tailed deer cause them to start their breeding season around the same time. Offspring are born the following spring and summer. What is the most likely explanation for white-tailed deer having a seasonal breeding cycle instead of a monthly breeding cycle like many domesticated animals?

• male and female deer come into contact with each other only in the fall

• large predators are not found in deer habitats during the spring and summer months

• giving birth only in the spring and summer ensures that offspring are born when food is most available

• deer give birth in the spring and summer in order to avoid being pregnant during the hot summer months

The green frog (Lithobates clamitans clamitans) is found in many parts of the United States. The table contains some information about this frog. Why does the ability to lay 1,000 to 5,000 eggs increase the fitness of the species L. clamitans clamitans?

• It increases opportunities for offspring to compete for limited resources.

• It increases the probability that some offspring will survive long enough to reproduce.

• It increases the probability that moving water will promote gene flow from one population to another.

• It increases the chance of the recombination of alleles, leading to genetic drift in the population.