Regents Review Quizizz #6

A student prepared a slide of pollen grains. 1st the pollen was viewed through the low-power objective lens and then the high power objective lens. Which statement best describes the relative number and appearance of the pollen grains observed using these two objectives?

• Low power: 25 small pollen grains

  High power: 100 large pollen grains

• Low power: 100 small pollen grains

  High power: 25 large pollen grains

• Low power: 25 large pollen grains

  High power: 100 small pollen grains

• Low power: 100 large pollen grains

  High power: 25 small pollen grains

This change in the red onion cell is most likely due to the cell being placed in

• distilled water

• light

• salt water

• darkness

Tags

NGSS.HS-LS1-3

How much water should be removed to leave 5 mL of liquid in the graduated cylinder?

• 6 mL

• 7 mL

• 11 mL

• 12 mL

A graph of the population growth of 2 different species is shown. Which conclusion can be drawn from the data on the graph?

• Oxygen concentration affects population sizes of different species in the same manner

• Low oxygen concentration does not limit the population size of either species observed.

• Species B requires a high oxygen concentration to stimulate population growth.

• Species A requires a high oxygen concentration for maximum population growth

Tags

NGSS.MS-LS1-5

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NGSS.MS-LS2-4

An experiment was carried out to determine which mouthwash was most effective against bacteria commonly found in the mouth. Four paper discs were each dipped into a different brand of mouthwash. The discs were then placed onto the surface of a culture plate that contained food, moisture, and bacteria commonly found in the mouth. The diagram below shows the growth of bacteria on the plate after 24 hours. Which change in procedure would have improved the experiment?

• using a smaller plate with less food and moisture

• using bacteria from many habitats other than the mouth

• using the same size paper discs for each mouthwash

• using the same type of mouthwash on each disc

Tags

NGSS.HS-ETS1-3

The effect of temperature on the action of pepsin, a protein-digesting enzyme present in stomach fluid, was tested. In this investigation, 20 milliliters of stomach fluid and 10 grams of protein were placed in each of five test tubes. The tubes were then kept at different temperatures. After 24 hours, the contents of each tube were tested to determine the amount of protein that had been digested. The results are shown in the table below. The dependent variable in this investigation is the

• size of the test tube

• time of digestion

• amount of stomach fluid

• amount of protein digested

A student's heard beats 15 times in 20 seconds. What is her pulse in beats per minute?

• 15

• 30

• 45

• 60

What is the human female reproductive system adapted for?

• production of zygotes in ovaries

• external fertilization of gametes

• production of milk for a developing embryo

• transport of oxygen through a placenta to a fetus

The human liver contains many specialized cells that secrete bile. Only these cells produce bile because

• different cells use different parts of the genetic information they contain

• cells can eliminate the genetic codes that they do not need

• all other cells in the body lack the genes needed for the production of bile

• these cells mutated during embryonic development

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NGSS.HS-LS1-1

NGSS.HS-LS1-4

Which set of factors plays the most direct role in controlling the events shown in the diagram?

• genes, hormones, and cell location

• antibodies, insulin, and starch

• ATP, amino acids, and inorganic compounds

• abiotic resources, homeostasis, and selective breeding

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-4