Unit 1
Which option describes a similarity between scientific laws and scientific theories?
Both can change in light of new evidence.
amoeba bacteria pine tree kangaroo
Which option correctly describes a similarity between the organisms?
They are all living organisms made of one or more cells.
Which option describes how genes control the traits of a cell?
Genes code for specific structures and molecules in a cell. Those structures and molecules form the traits of the cell.
Which statement is a pattern in the fossil record?
Multiple mass extinction events have occurred in Earth’s history.
Some baby birds peck at a red dot under their parent’s beak. This triggers a gagging reflex in the parent.
Which option describes how this behavior increases fitness?
The parent regurgitates the partly digested food for the baby bird. The baby bird can eat this food.
Which statement correctly defines ethics?
a set of moral values
A group of students is working on an experiment about cells. They heat some bacterial cells in an oven until all the cells die. The dead cells are then placed in a petri dish with nutrient molecules that are needed by cells to grow. The dish is kept at room temperature.
Which option correctly describes what will happen next?
No new bacterial cells will form.
Which option explains why genes are sections of chromosomes, but chromosomes are not made up of genes?
There are sections of chromosomes that are not genes.
Which statement about organisms in the fossil record is correct?
Organisms show a steady increase in diversity, interrupted by extinction events.
Which option describes why some bird species 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.
Which type of system allows energy, but not matter, to enter and leave?
closed
In an organism with more than one cell, some cells must burn food molecules to produce energy in order to survive.
Which option correctly rewords the false statement so that it is true?
In an organism with more than one cell, all cells must burn food molecules to produce energy in order to survive.
In eukaryotic organisms, genes usually consist of two alleles. The two alleles are often on different parts of the same chromosome.
These sentences contain incorrect information. Which option describes the mistake?
In eukaryotic organisms, the two alleles of the gene are on different chromosomes.
What can be said about living organisms and those in the fossil record?
Some organisms are much different from their ancestors in the fossil record, while other organisms have mostly stayed the same
Which physical adaptation increases an organism’s chances of finding a suitable habitat?
the long legs of wading birds