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Ch 7: Section 1-3 Life Science

Across
Chemicals that kill insects
the remains or imprints of once-living organisms
Some of the eggs will survive and develop into adult spiders. Some will not.
By studying fossils, scientists have made a timeline of life known as the ______ ________.
a form of an inherited characteristic
Every individual has its own combination of traits
British ship that Darwin was on
The practice in which humans select plants or animals for breeding based on desired traits is called _________.
someone who studies nature
The formation of a new species as a result of evolution is called ________.
The process in which populations change over time is called _________.
Down
happens when organisms that are well adapted to their environment survive, but less well-adapted organisms do not
A feature that helps an organism survive and reproduce in its environment is called an ____________.
show the relationships between species
offspring that can reproduce
___________ rock forms when pieces of sand, dust, or soil are laid down in flat layers
a group of organisms that can mate with one another to produce fertile offspring
A group of individuals of the same species living in the same place is a ___________.
_________ time is the average time between one generation and the next