41. True or False- No Protists cause disease in humans? 42. Phages infects... A. Protists B....

41. True or False- No Protists cause disease in humans?

42. Phages infects...

A. Protists

B. plants

C bacteria

D animals

43. Photoautotrophs use

A. Light as an energy source and methane as a carbon source

B. Light as an energy source and CO2 as a carbon source

c. CO2 as both an energy source and a carbon source

D. N2 as an energy source and CO2 as a carbon source.

Solutions

Expert Solution

Answer [Q:41]: False

Explanation: There are protists that cause most human disease.They are called protozoa.

- Examples are protist species Plasmodium causes malaria, Giardia causes giardiasis.

Answer [Q-42]: C. bacteria

Explanation: Phages are also known as bacteriophages. They are the virus that infect only bacterial cells.

- Phages are a good candidate to treat the bacterial diseases in human and in plants. Hence, Phages don't affect human and plants.

- As it solely infects bacteria there is no question of it infecting protist.

Answer [Q-43]: B. Light as an energy source and CO2 as a carbon source.

Explanation: As the name tells, photo (light) + autotroph (produces own food) is the one that uses light source along with water and CO2 to produce the organic materials (food).

Incorrect options:

A: The one that uses light as an energy source and methane as a carbon source could be categorized as photoorganoheterotroph.

C: There are bacteria that can use CO2 as both energy source as well as carbon source.

D: Chemoautotrophs use nitrogen as energy source and CO2 are carbon source.

gladiator answered 11 months ago

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