Humans and Bacteria New Visions

Quiz
•
Science
•
7th Grade
•
Medium
+3
Standards-aligned
Charles Martinez
Used 1+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A teacher tells her students that bacteria are both helpful and harmful to other organisms and the environment. Which statement could a student give in support of the teacher’s statement?
Bacteria can survive both in the presence and in the absence of oxygen.
Bacteria help make a variety of food items and also infect and damage many crops.
Bacteria can be found in extreme environments like hot springs and the Arctic.
Bacteria help in the digestion of food and also cause the decomposition of dead organisms.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A student makes a claim that certain bacteria are always harmful to humans. Which example can the student use to support this claim?
Staphylococcus epidermidis lives on the skin and only causes illness if it enters the body during surgery.
Escherichia coli fights harmful bacteria in the intestines and causes infections if found in the bladder.
Streptococcus pyogenes destroys red blood cells and causes illness when it enters the body.
Clostridium difficile lives in the intestines and only causes illness if it infects a wound.
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Most species of E. coli are harmless or even helpful forms of bacteria that are found in the human intestine. E. coli can aid humans in digestion and provide protection from other invading bacteria, but if the bacteria move to the human excretory system, they can replace other naturally occurring bacteria (Lactobaccilli). This can lead to bladder and kidney infections. Researchers found that by replenishing the excretory system with the naturally occurring bacteria, the infection caused by E. coli is cured.
Based on the research, what inference can researchers claim about the effect of bacteria?
E. coli can only be harmful to humans.
E. coli is always harmful, and Lactobacilli are always helpful to humans.
E. coli can be both helpful and harmful to humans.
E. coli is always helpful, and Lactobacilli are always harmful to humans.
Tags
NGSS.MS-LS2-4
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Clostridium difficile is a strain of bacteria that infects the bowel and causes diarrhea. A second bacteria,Lactobacillus casei, is given to patients with diarrhea to slow the growth of Clostridium difficile so the body can rid itself of the remainder of the bacteria. Based on the information, a student claims that all bacteria are not harmful.
Is the claim correct?
Yes. Lactobacillus casei works with the body to fight off infectious bacteria.
Yes. Lactobacillus casei can survive in the intestine.
No. Clostridium difficile causes infections in the bowel.
No. Clostridium difficile grows too quickly for the body to fight off the bacteria.
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Ted observed bacteria under a microscope. He recorded that the bacteria were long and had a beaded appearance.
Which shape of bacteria did Ted observe?
Bacillus
Coccus
Filamentous
Spirillus
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
How should Cells 1 and 2 be classified, and why?
Tags
NGSS.MS-LS1-1
NGSS.MS-LS1-2
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which student classified the bacteria accurately?
Tags
NGSS.MS-LS4-2
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