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Which equipment is most useful when measuring the two environmental changes mentioned above?
Barometer and voltmeter
Light meter and barometer
Voltmeter and thermometer
Thermometer and light meter
Maya wants to measure the width of her science book. Which measuring tool is best for Maya to use?
According to the Venn diagram, which feature does a Bald Eagle and an American Robin have in common?
The graph shows Panicum grass population counts over a ten-year period. Panicum is the main food source for finches in the area. Based on the graph, which of these can be expected of finch populations?
Increase in population in year 2
Decrease in population in year 3
Decrease in population in year 6
Increase in population in year 9
Which of the following statements is a scientific hypothesis?
Flossing has proven to be an effective method of improving oral health.
Many infectious diseases, such as gum disease, are caused by microorganisms
In general, any method that reduces bacteria in the mouth will improve oral health.
An individual who flosses daily will be less likely to get gum disease than one who flosses weekly.
A tire company plans to design a tire that reduces the amount a car slides on icy roads. Which step should the company perform first?
perform a survey to find out if drivers prefer non-slip tires
compare the costs of different types of tire materials
test a set of tires in different weather conditions
research the ability of different materials to grip road surfaces
Which sequence correctly describes the flow of energy between organisms in the marine food web?
from seals to penguins to krill
from whales to krill to small fish
from sea birds to seals to penguins
from small fish to penguins to seals
A food web is shown above. If the rabbit population increases, which of the following is most likely to happen soon afterward?
The deer population will increase.
The plant population will decrease.
Different birds will move into the area.
The insect population will be eliminated.
Which animal would be the tertiary consumer
Hawks and owls
Which statement describes a main difference between primary and secondary succession?
Primary succession is always followed by secondary succession.
Secondary succession always ends in a climax community while primary succession does not.
Primary succession always starts with barren, rock areas while secondary succession does not.
Secondary succession always reaches a climax community of trees while primary succession ends with pioneer species.
Surtsey is an island located south of Iceland. The island was formed by a volcanic eruption and first appeared in 1963. The table below contains descriptions of changes in the population and diversity of species on Surtsey.
Which of these lists the descriptions in the correct order of ecological succession on Surtsey?
I, II, IV, III
III, I, II, IV
IV, III, I, II
II, IV, I, III
In which kingdom does organism X belong?
Geologists discovered that each layer contains a unique set of fossils. Which conclusion is best supported by these rock layers?
The fossils in layer 1 are from the most recent forms of life.
The fossils in layer 2 are from animals that lived in a terrestrial environment.
The fossils in layer 3 evolved from the fossils in layer 2.
The fossils in layer 4 are from the most complex forms of life.
Which best illustrates the relationship between variations within a population and natural selection?
Natural selection acts upon a population since all members of the population are identical.
Organisms are able to change their genetic makeup to best adapt to a changing external environment.
Giraffes have long necks and legs from stretching to reach food in trees. This trait was then passed to their offspring.
Antelopes with muscular legs are able to outrun their predators better than antelopes with poor muscle tone. Thus they lived to reproduce.
According to this phylogenetic tree, which organism is most closely related to Organism
Nancy analyzed water samples from several sources: rainfall, a nearby creek, a swimming pool, and her kitchen faucet. She recorded her data in the table. Which sample was most acidic?
Baby food manufacturers sometimes use proteases in their products. Proteases catalyze the breakdown of the proteins in these foods, making digestion easier for infants. Proteases are which of the following types of molecules?
What can be concluded about the enzyme?
The enzyme works best at a pH of 8 and a temperature of 25◦C.
The enzyme only works at a pH of 8 and a temperature of 25◦C.
The enzyme is used up at a pH of 11 and a temperature of 35◦C.
The enzyme works better at a pH of 8 than a temperature of 25◦C.
Amylase allows the body to break down starch. What would amylase be called?
Glucose is a building block of carbohydrates. Which of these best describes glucose?
Which of these best represents a fatty-acid molecule?
In which of the following ways does a bacterial cell differ from an animal cell?
A bacterial cell is much larger than an animal cell.
A bacterial cell has more mitochondria than an animal cell.
A bacterial cell has RNA for its genetic material, whereas an animal cell does not.
A bacterial cell does not have membrane bound organelles, whereas an animal cell does.
Cell X is a prokaryotic cell and cell Y is a eukaryotic cell.
Cell X is an archae cell and cell Y is a eubacterial cell.
Cell X is a red blood cell and cell Y is a muscle cell.
Cell X is a plant cell and cell Y is an animal cell.
If a cell’s lysosomes were damaged, which of the following would most likely occur?
The cell would produce more proteins than it needs.
The cell would have chloroplasts that appear yellow rather than green.
The cell would be less able to break down molecules in its cytoplasm.
The cell would be less able to regulate the amount of fluid in its cytoplasm.
Which structure is found in a plant cell but not in an animal cell?
Which of these best completes this concept map?
an animal cell
a prokaryotic cell
a plant cell
Which cell part is correctly paired with its function?
nucleus—controls cell activities
chloroplast—outside boundary of plant cells
cell wall—controls what goes in and out of cells
cell membrane—where photosynthesis takes place
Plants use energy from sunlight, water, and carbon dioxide to produce sugar. Which structure is found only in plant cells and helps plants capture energy from sunlight?
With a microscope, you see that an object has a cell wall, a chloroplast, and a nucleus. What is being observed
a plant cell
an animal cell
a male organism
a female organism
A scientist discovered a new organism in some caves in Pennsylvania. The organism has the following characteristics: · It is multicellular. · Its cells lack cell walls. · It is motile. · It is heterotrophic. Based on this information, to which kingdom does the organism belong