Guppies that live in an area without predators are colorful. Guppies that live in an area with predators are not colorful.
The predators in an area die because of disease.
Which of these is most likely to happen to the guppy population in this area over time?
Complete the following statement with the options provided below:
There will be in the number of colorful guppies because due to disease.
A paleontologist was studying how different environmental factors affected evolution by examining the fossil record. One of his samples is shown below.
This is an example of because .
The table (below) shows the survival rate of two types of beetles in the same environment over a period of three years.
Which statements about the beetles in this environment is best supported by the data?
Select TWO correct answers:
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?
10B - 2024 Q34
The bar graph shows the average break depth (distance from the top of the beak to the bottom) of a population of finches. The data were collected in 1976 and 1978, after a drought occurred in 19777 in the area.
Which factor BEST describes the change in this population of finches?
10B - 2023 Q 38
The figure shows fossilized and living stalk-eyed flies from the family Diopsidae. In fossils, the eye spans of the flies are much smaller than those of living flies.
Which question would BEST help determine whether the change in eye span in stalk-eyed flies influenced by natural selection?
The picture (below) shows what the environment was like both before and after the Industrial Revolution. Industrialization in England produced black soot (powder) that covered many tree trunks and branches. At about the same time, the number of light-colored moths in this part of the country began to decrease over time.
10C (readiness)
Why did the light colored moth population decrease over time?
10C - 2023 Q20
The salamanders of the genus Ambystoma in northeastern North America are an entirely female population that reproduces asexually through the process of cloning. However, they have developed a way of inserting DNA from other species of salamanders into their own DNA.
How has DNA from other salamander species helped these Ambystoma salamanders survive environmental changes over the past 6 million years?
10C - 2022 Q49 (readiness + picture added)
Test
Most animals avoid eating monarch butterflies due to their bad taste. Viceroy butterflies look very similar to monarchs.
Which of these best explains how the viceroy butterfly benefits from looking like the monarch butterfly?
10C readiness 2019 Q1 (phrased as is - picture added)
Test (remove picture!! use pic as support)
A new predator of rabbits has been introduced within an ecosystem. This new predator runs faster than the native predators of rabbits.
Which statement describes what will most likely occur in the rabbit population due to the introduction of the new predator?
*Use parenthesis for language support
10C readiness - 2019 Q16
Test
The aye-aye lemur is a mammal that feeds mostly on insect larvae that live inside trees. The aye-aye lemur has a specialized middle finger that is long and thin. The aye-aye lemur moves along a tree branch and taps the branch with its specialized finger.
When the aye-aye lemur hears a difference in echo, it will tear open the bark with its teeth until the insect tunnel is exposed (visible). The aye-aye lemur then uses its specialized finger to reach the insect larvae and remove it to eat it.
Which selective pressure most likely resulted in the development of the aye-aye lemur's special adaptation?
10C (readiness)
Test
Adaptations that result from Natural Selection are expected to increase the fitness of an organism. In terms of Natural Selection, which of the following best describes fitness?
10D - 2023 - Q40
The Florida panther (Puma concolor coryi) population had declined to approximately 20 to 30 individuals as a result of habitat loss and hunting. Many of the panthers had genetic mutations due to inbreeding that affected their ability to reproduce and survive. Female Texas (Puma concolor stanleyana) pumas were introduced into Florida to mate with the endangered population of panthers. Hybrid panthers had more genetic variation and reproductive success than the Florida panthers.
Which table best represents the mechanism of evolution and the effect on the gene pool of the Florida population?
10D - 2022 Q43
Test as paired passage 2 parts (1 point each)
The cross-pollination of flowers from the two different populations by bees will most likely result in-
10D STAAR 2019 Q22 - phrased as is
Conservational biologists studying cheetah populations have determined that the lack of genetic diversity among the cheetahs is due to genetic drift.
Which statement explains the most likely consequence of having a low genetic diversity on the cheetah population?
9A 2022 Q41
A phylogenetic tree based on genetic similarities is shown.
Which numbered location on the phylogenetic tree identifies characteristics shared by species B, C, and D?
9A 2024 Q19
Cytochrome C is a protein that is found in the mitochondria of all aerobic eukaryotic cells. The gene sequence for cytochrome c has been mapped and analyzed for thousands of species. The table shows the percentage of the cytochrome c amino-acid sequence that different species have in common.
Which list is ordered from the species most closely related to the mouse to the species least closely related to the mouse?
9A STAAR 2019 - Q47
Test
This cladogram shows the evolutionary relationships among some mammals based on homologous structures.
Which statement is supported by this cladogram?
9A
TEST CER
Scientists can determine relatedness among organisms by comparing partial amino acid sequences. The table (below) shows five partial amino acid sequences from five different organisms.
Which organism is most closely related to the horse? Provide evidence to support your claim.
Rubric:
1 point - Identifies the ZEBRA as being most closely related
1 point - has most amino acids in common / 3 out of 4 amino acids in common / other organisms have more differences / both have Arg-Lys-His / only one amino acid different / most DNA in common
9A STAAR 2021 - Q13
A cladogram of five species is shown.
Based on the cladogram, the ancestral species most likely had —
9B (similar to STAAR 2023 Q27)
Two scientists studied patterns of evolution in the fossil record. Many species they analyzed showed periods of slow changes interrupted by a period of rapid change.
This pattern of periods of slow change interrupted by periods of rapid change with few, if any transitional fossils, best describes the theory of-
9B (2019 Q12 gradualism)
The diagram (below) shows data on the evolution of adult horses.
The data in the diagram is evidence that...
HIGH - 10C AAC
Scientists have observed that two closely related species of antelope squirrels live on opposite sides of the Grand Canyon: Harris's Antelope Squirrel and the White-Tailed Antelope Squirrel. These squirrels are believed to have descended from a common ancestor.
Are these two squirrels able to reproduce with each other?
What type of speciation has occurred?
Think about the questions carefully. Then enter your answer and your explanation in the box provided.
LOW 9A AAC
Bactrian camals, dromedaries, llamas, and alpacas are all members of the same taxonomic family, Camelidae. Members of this family all have two toes, no hooves, true canine teeth, and a split upper lip. The family Camelidae originated in North America.
The physical features of animals in this family and the family's geographical origin provide evidence that all of these animals...
HIGH- AAC 10C
About 10,000 years ago, towards the end of the last ice age, the frozen land bridge that connected North America and Asia melted as the Earth became warmer. This separated the populations of many animal species in North America from the populations located in Asia.
Which of these best explains what happened to the populations of organisms in North America and Asia over time?
MED - AAC 10C
Lake Apoyo is a small volcanic crater lake located in Nicaragua. Within this lake, there are two species of fish not found anywhere else in the world.
The Black Midas cichlid feeds on shrimp and stays at the bottom of the lake, while the Arrow cichlid feeds only on algae from fallen trees on the water surface. These two species avoid each other in the lake and do not interbreed.
Based on the information provided, the development of these two species was most like due to-
10 A/C (readiness)
Over time, Natural Selection caused a change in the moth population mentioned in the question above.
Which of the following most likely occurred as the result of Natural Selection?
(similar to 2022 Q43 for 10D)
When the cross-pollination of these flowers contributes to the gene pool of the population, which of these most likely increases?
