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Flashcards in Ch-11 Deck (28):
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The millions of fossils that scientists have collected are called the

Fossil record

1

Scientists infer evolutionary relationships by comparing the early development of

Organisms

2

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

Ancestor

3

Change over time is know as the theory of

Evolution

4

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

Homologous structures

5

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

Gene

6

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

Protein structure

7

an organisms blank is it's basic body plan

Body structure

8

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

Backbone

9

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

Amino acids

10

Darwin was amazed during his journey to find so much

Diversity

11

The different shapes of bird beaks are an example of

Adaption

12

Only the organisms with a desired charecteristics are bred in

Artificial selection

13

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

Changed over time

14

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

More

15

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

The orgin of species

16

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

Variation

17

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

Domesticated

18

Darwin made a number of important observations on the blank islands

Galápagos Islands

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

Species

20

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

Barrier

21

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

The same

22

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

Diversity of niches

23

Blank explains how variations can lead to changes in a species

Natural selection

24

Occurs when some members of a species become cut off

Isolation

25

Species that could become endangered in the near future are called

Threatened species

26

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

Habitat

27

The Florida panthers are considered an blank species

Endangered