Download Crossword 16.2 - 16.3 Natural Selection

Name _________________________________
16.2 – 16.3 Natural Selection
Foundations
Period ____
1
Date ____________ Seat ______
2
3
4
5
6
7
8
9
10
11
15
12
13
14
16
17
18
19
20
21
24
25
EclipseCrossword.com
22
23
16.2 – 16.3 Natural Selection
Foundations
Across
1.
5.
6.
7.
8.
9.
17.
20.
21.
24.
25.
The selective breeding of plants and animals to promote desirable traits in offspring. (Two words)
(387)
According to the theory of evolution, all organisms share a single, common __. (391)
Introduced by James Hutton, it is the idea that Earth's history is so long that it is difficult to imagine.
(Two words) (384)
A scientists who independently came up with the same theory as Darwin (natural selection) at about
the same time. (Last Name)(388)
He proposed that all organisms are born with a desire to become better and could change their
bodies so that they worked better in their environment. (Last Name) (385)
In natural selection, the __ determines which individuals survive and reproduce. (389)
Lamarck's idea that traits could change during the life of an organism. An example is that a bird's
legs could become longer by stretching each day. (Two words) (385)
How well an organism can survive and reproduce in its environment. (388 - 389)
The struggle for __ is a phrase Darwin used to describe the fact that members of a population must
compete for food, water, and living space. Those that do not get enough will not survive to
reproduce. (388)
The name of Darwin's book published in 1858. (5 words) (388)
The idea how organisms share ancient ancestors. (Two words) (391)
Down
1.
2.
3.
4.
10.
11.
12.
13.
14.
15.
16.
18.
19.
22.
23.
A heritable trait that increases an organism's ability to survive and reproduce in an environment.
(388-389)
A geologist in Darwin's time that concluded that geological processes in the past worked like the
geological processes of today. (Last Name) (385)
In Darwin's time, many people believed that Earth was only a few __ years old. (384)
The process by which organisms that are most suited to their environment survive and reproduce
most successfully; also called survival of the fittest. (Two words) (389)
After working out his theory on natural selection, Darwin spent another __ years gathering more
information and evidence before sharing his ideas with the public. (388)
Lamarck thought that acquired traits could be passed on to offspring. For example, over a few
generations, the neck of a giraffe would get longer and longer. He called this idea the __ of
acquired traits. (385)
Every organism alive today descended from parents that were well __ to their environment and thus
able to survive and reproduce. (391)
Darwin had no idea how heredity worked, but he did know that __ occurs in wild species as well as
farm species. (388)
A geologist in Darwin's time that described how geological processes shaped the land to make
mountains, canyons, rivers, and plains. He suggested that these formations took millions of years
to make. (Last Name) (384)
An English economist in Darwin's time who thought that human overcrowding led to conditions that
would slow population growth. These conditions included war, disease, and starvation. (Last
Name) (386)
The science that deals with the earth's physical structure and substance, its history, and the
processes that act on it. (384)
In artificial selection, the __ selects which individuals reproduce. (389)
Darwin called the process by which older species evolved into new species over thousands or
millions of years, "descent with __." (391)
Today scientists know that most of Lamarck's ideas were wrong. Animals do not have a desire to
become better. Evolution is not a process that makes animals more "__" over time. (385)
Darwin read Malthus' ideas about the dire consequences of human over-population and saw that
they were __ for all organisms. (386)