7th Grade Science Unit 1 - early life | Baamboozle - Baamboozle

Dolphin embryos show four limbs, and baby dolphins are born with hair. Why is it important for scientists to study embryos as well as adult organisms?

embryos can show features that isn't seen in adults

Embryos are easier to observe than adults.

Adult organisms do not have any bones.

embryos helps scientists predict the size of the adult anima

Which of the following can studying embryos help scientists understand?

How species may be related through common ancestors

How fast an animal can run

Which species is the smartest

The exact color of an adult animal

the prefix "terre" means

land/earth

the prefix "tetra" means ____

four

a trait that evolves over time from common ancestor

derived trait

organism that comes after ancestors

descendants

organism that comes before descendants

ancestor

evolutionary tree; shows ancestors, descendants, over a long time

cladogram

process where organisms change/diversify over a long time

evolution

an unborn organism in the very early stages of development

embryo

a vertebrae with 4 limbs (birds, amphibians, reptiles, mammals)

tetrapod

remains of the actual organism; shells, bones, teeth preserved

body fossil

traces of organisms' activities; burrows, footprints, drag marks

trace fossil

when every individual of a species dies out

extrinction

What would a paleontologist NOT do?

Track the migration of living animals

Study fossils to learn about ancient life.

Use rock layers to determine the age of fossils.

Compare fossil evidence to modern organisms.

a scientist who studies fossils

paleontologist

states that oldest rocks are on the bottom while younger ones are close to the top

law of superpositions

layered rock formed as sediments compress and cement togetherp; often contains fossils

sedimentary rock

a collection of fossils that give clues to the history of life on Earth

fossil record

the remains of ancient organisms

fossil

Which statement best describes biodiversity?

it gradually increased when animals moved onto land

Stayed the same until humans appeared

Only marine animals existed until the Mesozoic

Dinosaurs were the only contributors to biodiversity

variety of living organisms in a particular area or on Earth as a whole

biodiversity

any living thing that can carry out life processes on its own

organism

In a sequence of rock layers, what would scientists expect to find in the youngest (top) layer?

Fossils of mammals, birds, flowering plants, and humans

Fossils of simple bacteria and algae

Fossils of early marine animals from the Cambrian Period

Fossils of dinosaurs only

In a sequence of rock layers, what would scientists expect to find in the oldest (bottom) layer?

Fossils of early life forms like algae or marine animals

Fossils of mammals and humans

Fossils of flowering plants and insects

Fossils of birds and dinosaurs

The "one bone"- "two bones" - "many bones" indicates __________

all tetrapods share a common ancestor.

tetrapods evolved completely independently

tetrapods first evolved wings instead of legs

limb bones develop randomly w/no evolutionary significance

Early tetrapods were fully aquatic but were developing structures that would later allow movement on land

this occured during the Devonian Period

this occured during the Cambrian Period

this occured during the Permian Period

this occured during the Jurassic Period

A fossil shows evidence of a tetrapod living in shallow water 375 million years ago. What does this suggest about the transition from aquatic to land animals?

Some vertebrates were beginning to adapt to life on land

All animals had already moved completely onto land

Tetrapods lived only in the deepest parts of the ocean

Land plants forced animals to leave the water

Why didn’t the soft parts of early animals usually fossilize?

Soft tissues decayed or were eaten before they preserved

Soft parts were too small to be seen by scientists

Fossils can only form in very cold climates

Early animals lived only on land, far from where fossils for

During the Cambrian Period, most life forms were aquatic. What does the fossil record from this time reveal?

Water covered the majority of the Earth

Large dinosaurs living on land and in the oceans

Humans and mammals becoming the dominant life forms

Land plants and forests covering Earth’s continents

Which animal is least closely related to the others?

tortoise

wolf

horse

kitty cat

Which two animals are most closely related according to the cladogram?

Leopard and house cat

Horse and tortoise

Wolf and tortoise

Horse and tortoise

Organisms that share more traits on a cladogram are:

more closely related

Less closely related

The same age

Always the same species

What does a cladogram show?

Evolutionary relationships among organism

The order in which fossils are found

The age of rocks

The size of organisms

Which type of organisms is least likely to appear in the fossil record?

Soft-bodied organisms like worms and jellyfish

Animals with shells

Fish with bones

Dinosaurs

Which of the following correctly describes the “one bone → two bones → many bones → digits” pattern?

Shows how vertebrate limbs are related and adapted

Only found in humans

Only occurs in fish

Does not relate to evolution

What was the main type of life during the Ordovician Period?

Marine invertebrates like brachiopods and mollusks

Dinosaurs

Mammals

Birds

Why are land plants important in evolution?

They allowed animals to colonize land

They replaced fish in oceans

They produced shells for protection

They could fly

During which period did the first tetrapods appear?

Devonian

Cambrian

Ordovician

Silurian

What were the first organisms on Earth?

Single-celled prokaryotes

dinosaurs

amphibians

land plants

Which of the following animals does NOT follow the one → two → many → digits pattern?

None of the above; all follow the pattern

Fish

Amphibians

Humans

Why is this bone pattern important?

shows a common ancestor, how limbs adapted for environments

shows that vertebrate limbs are all completely different

It proves that fish could not evolve into land animals

It only applies to birds

What is the significance of the “digits” in the pattern?

allow animals to swim, walk, climb, or manipulate objects

They are just for decoration

They make the limb shorter

They are only found in humans

Fossilization requires certain conditions. Which of the following helps a fossil form?

Rapid burial in sediment

Exposure to air and sunlight

Being eaten by predators

Floating on the ocean surface

Why doesn’t the fossil record show all organisms that have ever existed?

Fossilization is rare, soft-bodied organisms decay, and many

Most organisms never lived long enough to be important

All organisms are equally likely to become fossils

Scientists have already found every fossil on Earth