B.9.A Natural Selection Exit Ticket

Cytochrome c is a protein used in aerobic respiration. Scientists compared the amino acid sequences of cytochrome c in different species to determine evolutionary relationships. The table shows the percent similarity of cytochrome c between the mouse and several other species.

Which list shows the organisms in order from most closely related to the mouse to least closely related, based on molecular data?

• . Horse, chimpanzee, donkey, lamprey

• Lamprey, donkey, chimpanzee, horse

• Donkey, horse, chimpanzee, lamprey

• Donkey, horse, lamprey, chimpanzee

Tags

B.9.A

Question:

Scientists use the fossil record to determine changes in an environment. What does the abrupt appearance of new organisms show?

The abrupt appearance of new organisms is evidence of ​​ (a)   and ​ (b)   .

• an increase in biodiversity
• an unstable environment
• the age of fossils
• stasis
• transitional fossils
• gradualism

Tags

B.9.B

When transitional fossils are found in successive rock layers showing small changes in structure, they provide evidence of —

• gene expression during embryonic development

• adaptation due to convergent evolution

• gradual evolutionary change over time

• a decrease in biodiversity within the population

Tags

B.9.B

Fossils of a sea species show little to no change over millions of years, followed by a short period of rapid change and the appearance of several new traits.

Which term BEST describes this pattern?

• Speciation by geographic isolation

• Punctuated equilibrium

• Adaptive radiation

• Gradualism

Tags

B.9.B

A scientist observes a population of bacteria exposed to an antibiotic. At first, most bacteria die, but a few survive due to a genetic mutation that gives them resistance. Over time, more bacteria in the population are resistant to the antibiotic.

Which statement BEST explains why the antibiotic is no longer effective?

• The resistant bacteria began absorbing nutrients more efficiently.

• The antibiotic stopped working in all environments.

• The resistant bacteria survived and reproduced, passing the trait on to offspring.

• The resistant bacteria were killed by the immune system before they could multiply.

Tags

B.10.A

During early stages of development, snake embryos show tiny limb buds that later disappear before hatching.

Which statement BEST explains this pattern of development?

• Snakes are evolving into animals that use legs again

• The limb buds help the snake move while still in the egg.

• The limb buds are evidence that snakes share ancestry with animals that had limbs.

• Limb buds are created randomly during the early stages of embryo development.

Tags

B.9.A