Ch-11

Question 0

Scientists infer evolutionary relationships by comparing the early development of

Answer 0

Organisms

Question 1

The millions of fossils that scientists have collected are called the

Answer 1

Fossil record

Question 2

Scientists infer that species with similar body structures and development patterns had a common

Answer 2

Ancestor

Question 3

Change over time is know as the theory of

Answer 3

Evolution

Question 4

Similar structures related species have inherited from a common ancestor are called

Answer 4

Homologous structures

Question 5

Scientists compare the blank bases in the DNA of different species to infer how closely related the species are

Answer 5

Gene

Question 6

In most cases evidence form DNA and blank has confirmed conclusions about evolutionary relationships based on fossils,embryos,and body structure

Answer 6

Protein structure

Question 7

an organisms blank is it’s basic body plan

Answer 7

Body structure

Question 8

Fishes amphibians reptiles birds and mammals all have an internel skeleton with an

Answer 8

Backbone

Question 9

Scientists can compare the order of blank in a protein to see how closely related two species are

Answer 9

Amino acids

Question 10

Darwin was amazed during his journey to find so much

Answer 10

Diversity

Question 11

The different shapes of bird beaks are an example of

Answer 11

Adaption

Question 12

Only the organisms with a desired charecteristics are bred in

Answer 12

Artificial selection

Question 13

From the evidence he collected Darwin concludes that organisms on the Galápagos Islands

Answer 13

Changed over time

Question 14

Today scientists know that organism are much blank diverse than Darwin imagined

Answer 14

More

Question 15

In Darwin’s book blank he proposed that evolution occurs by mean of natural selection

Answer 15

The orgin of species

Question 16

Without blank all the members of a species would have the same traits

Answer 16

Variation

Question 17

To understand how evolution might occur Darwin studied the offspring of blank animals that were produced by artificial selection

Answer 17

Domesticated

Question 18

Darwin made a number of important observations on the blank islands

Answer 18

Galápagos Islands

Question 19

A new species can form when a group of individuals remain completely separated from the rest of its blank long enough to evolve different trailts that prevent reproduction

Answer 19

Species

Question 20

A natural blank such as a river or volcano may separate group members

Answer 20

Barrier

Question 21

The Kaibab squirrel and the aberts squirrel are members of blank species

Answer 21

The same

Question 22

Factors that affect biodiversity in an ecosystem include area climate genetic diversity and blank

Answer 22

Diversity of niches

Question 23

Blank explains how variations can lead to changes in a species

Answer 23

Natural selection

Question 24

Occurs when some members of a species become cut off

Answer 24

Isolation

Question 25

Species that could become endangered in the near future are called

Answer 25

Threatened species

Question 26

The use of Florida land for framing and home building has reduced the amount of blank in which panthers could find food

Answer 26

Habitat

Question 27

The Florida panthers are considered an blank species

Answer 27

Endangered