Unit 8 Test Study Guide - Biology 1

What type of fossils provide evidence for transitional forms between species?

• Index fossils

• Trace fossils

• Transitional fossils

• Replacement fossils

Answer explanation

Transitional fossils are crucial as they show intermediate forms between different species, providing evidence of evolution. They illustrate how species have changed over time, unlike index, trace, or replacement fossils.

Tags

NGSS.HS-LS4-5

Fossils of marine animals found on mountain tops suggest that:

• Those animals could fly

• The mountain was once underwater

• Earth's climate has never changed

• Marine animals lived on land

Answer explanation

Fossils of marine animals on mountain tops indicate that these areas were once underwater, as marine life cannot exist at such elevations today. This supports the idea of geological changes over time.

Tags

NGSS.HS-ESS1-5

Structures that have similar function but different evolutionary origins are called:

• Homologous structures

• Analogous structures

• Vestigial structures

• Fossilized structures

Answer explanation

Structures that have similar functions but different evolutionary origins are called analogous structures. They arise independently in different species, unlike homologous structures, which share a common ancestor.

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NGSS.MS-LS4-2

A bat's wing and a human arm are examples of ________ structures.

• Analogous

• Homologous

• Vestigial

• Fossilized

Answer explanation

A bat's wing and a human arm are homologous structures because they share a common evolutionary origin, despite serving different functions. This indicates they have similar underlying anatomy.

Tags

NGSS.MS-LS4-2

The fact that whales have pelvic bones suggests that:

• They evolved from land mammals

• They once had larger bones

• They are closely related to fish

• They are unrelated to other mammals

Answer explanation

The presence of pelvic bones in whales indicates they share a common ancestor with land mammals, suggesting their evolutionary transition from land to water, rather than being closely related to fish or unrelated to other mammals.

Tags

NGSS.HS-LS4-1

Similarities in early embryonic development among vertebrates suggest:

• They share a common ancestor

• Evolution is a random process

• Embryos develop differently over time

• Evolution does not occur

Answer explanation

Similarities in early embryonic development among vertebrates indicate they share a common ancestor, as these traits suggest a shared evolutionary history rather than random processes or differing developmental paths.

Tags

NGSS.HS-LS4-1

DNA evidence supports evolution by showing that:

• All species have identical DNA

• Closely related species have more similar DNA

Answer explanation

DNA evidence supports evolution by showing that closely related species have more similar DNA, indicating a common ancestry. This genetic similarity reflects evolutionary relationships, unlike the incorrect notion that all species have identical DNA.

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-1

The most reliable evidence for common ancestry comes from:

• Physical appearance

• Fossil age

• DNA sequences

• Embryonic development

Answer explanation

DNA sequences provide the most reliable evidence for common ancestry because they reveal genetic similarities and differences that reflect evolutionary relationships, unlike physical traits or fossil ages.

Tags

NGSS.HS-LS4-1

Humans share the highest percentage of DNA with which organism?

• Chimpanzees

• Frogs

• Birds

• Fish

Answer explanation

Humans share about 98-99% of their DNA with chimpanzees, making them our closest living relatives. This high percentage highlights the close evolutionary relationship between the two species.

Tags

NGSS.HS-LS3-1

What type of molecules are commonly used to compare evolutionary relationships?

• Proteins and DNA

• Carbohydrates and lipids

• Fossils and RNA

• Hormones and blood types

Answer explanation

Proteins and DNA are commonly used to compare evolutionary relationships because they provide genetic and functional information that can reveal similarities and differences among species, aiding in phylogenetic analysis.

Tags

NGSS.HS-LS4-1