ANATOMY

Previous
Next

GENERAL ANATOMY

DIGESTIVE SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Bacteria are very small single-celled organisms that lack a nucleus. Although bacterial cells are less complex than the cells that make up the human body, bacteria are very important to human health. Which statement best summarizes how bacteria affect human health.
A
Bacteria cause disease in humans.
B
Bacteria are beneficial to humans.
C
Bacteria rarely affect human cells because they are so much smaller.
D
Some bacteria are beneficial to humans and some are harmful.
Explanation: 

Detailed explanation-1: -Bacteria are single celled microbes that lack a nucleus. Archaea are like bacteria, but they have different structures and properties. This gives them the ability to live in extreme environmental conditions. Protozoa are unicellular microorganisms that have nuclei.

Detailed explanation-2: -Bacteria lack a membrane-bound nucleus and other internal structures and are therefore ranked among the unicellular life-forms called prokaryotes.

Detailed explanation-3: -Bacteria are prokaryotes, lacking well-defined nuclei and membrane-bound organelles, and with chromosomes composed of a single closed DNA circle.

Detailed explanation-4: -Bacteria are single-celled organisms Bacteria are very simple compared to most other organisms. They are made up of just one cell – and that cell is smaller and less complex than most of the other cell types in existence.

There is 1 question to complete.
Previous
Next