unit 1
Which statement about the heliocentric theory is correct?
Heliocentric theory is a set of testable explanations describing the Sun as being the center of the solar system.
Examine the list of organisms.
amoeba
bacteria
pine tree
kangaroo
They are all living organisms made of one or more cells.
Which of Mendel’s discoveries had the most important role in leading scientists to understand DNA held the genetic code?
Genes are made up of two alleles, and each allele comes from one parent.
How are the ages of extinct organisms determined?
by studying the concentration of radioactive atoms in their fossils
Which organism exhibits dormancy?
some protists
What is a tool that organizes the different types of atoms?
periodic table
When a person looks at an object, the sense receptors in the eyes respond to changes in what?
light
Which human traits form a wide range of states instead of two distinct states?
hair color
what is species
a group of potentially interbreeding organisms that have the ability to produce fertile offspring
what is pollution
any substance or thing that is introduced into the environment and has a harmful effect on it or the organisms living within it
Which practices add to scientific knowledge?
inferring, predicting, drawing conclusions
Where does photosynthesis occur in a plant cell?
chloroplasts
Which molecule is a pigment?
chlorophyll
what is extinction
an occurrence where a species dies out
what is acid rain
any form of precipitation with acidic components, caused from the mixture of water in the atmosphere with certain chemicals.