unit 1
what is an observation?
information gathered using senses
who did the experiment that proved that new cells come from existing cells?
Louis Pasteur
where is the genetic code found?
DNA
what is a fossil?
mineral replacements, preserved remains, or traces of organisms that lived in the past
why do some birds choose to migrate?
Some birds migrate to avoid harsh winter and summer conditions. By migrating, birds can be in regions that experience mild winters and mild summers.
where is the Large Hadron Collider?
geneva, Switzerland.
Where does photosynthesis occur in a plant cell?
chloroplasts
how many pairs of chromosomes are there?
23 pairs or 46 total chromosomes.
how is the process of absolute dating used?
determine how much time has passed since rocks formed by measuring the radioactive decay of isotopes or the effects of radiation on the crystal structure of minerals. Paleomagnetism measures the ancient orientation of the Earth's magnetic field to help determine the age of rocks.
what is having a stable internal environment called?
homeostasis
when did Charles darwin write "the origin of species"?
1859
what did Friedrich Miescher discover?
he discovered the existence of a molecule later known/called DNA.
What is protein?
naturally occurring, an extremely complex substance that consists of amino acid residues joined by peptide bonds. Proteins are present in all living organisms and include many essential biological compounds such as enzymes, hormones, and antibodies.
what is a geological timeline?
a relative scale divided by time in geologic history; a way to organize earth’s history based on the layer of the earth where each time period is recorded
what problems do landfills create?
bad smells and toxic chemicals in groundwater.
What practices add to scientific knowledge?
inferring, predicting, drawing conclusions
what is the shape of DNA?
double helix
what is the recessive allele?
a phenomenon in which two identical alleles are needed to affect the phenotype
how long ago was the Precambrian era?
4.5 billion – 550 million years ago
Which is the cause of acid rain?
sulfur gas emissions by human activities
what is the disease that causes soreness, bleeding gums, slow healing, and could even lead to death?
Scurvy
what is the process known as selfing?
fertilization by means of pollen from the same plant; self-pollination.
what is heterozygous?
a genotype composed of two different alleles
what statements did Hutton and Lyell make?
claimed that Earth was very old and changed very slowly over time.
Which defines behavioral adaptations?
behaviors performed by an organism that increase its fitness