BI 234 EXAM 1 QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED LATEST UPDATE

BI 234 EXAM 1 QUESTIONS AND ANSWERS WITH

COMPLETE SOLUTIONS VERIFIED LATEST UPDATE


Autotroph

An organism that makes its own food

Heterotroph

organism that obtains energy from the foods it consumes; also called a consumer

Eukaryote

A cell that contains a nucleus and membrane bound organelles

Prokaryote

A unicellular organism that lacks a nucleus and membrane bound organelles

Major characteristics of bacteria and archaea

-unicellular

-prokaryotes

-may have flagella

-binary fission

-cell wall

-heterotrophs and autotrophs



Archaea have psuedomurein cell wall; bacteria have peptidoglycan cell wall.

Major characteristics of Fungi

,- heterotrophs

- unicellular or multicellular

- eukaryotes

- non-motile

- mitosis (budding)

- cell wall made of chitin

Major characteristics of Protozoa

- autotrophs and heterotrophs

- unicellular

- eukaryotes

- flagella, cilia, pseudopods, or non-motile

- mitosis

- no cell wall

Major characteristics of Algae

- autotroph

- unicellular and multicellular

- eukaryotes

- non-motile

- mitosis

- cell wall made of cellulose

Major characteristics of Helminthes (parasitic worms)

- heterotrophs

- multicellular

, - eukaryotes

- move by muscles

- mitosis

- no cell wall

Major characteristics of a virus

- acellular

- DNA or RNA

- non-motile

- no cell wall, but have protein coat

Major characteristics of prions

- acellular

- no DNA



they are a protein

Major roles of microbes in the environment

- breakdown and recycle nutrients in the soil.



-photosynthesis



-digestive tracts in humans to help breakdown food to convert to energy

Why are microbes essential for life?

convert chemical compounds into nutrients for other organisms. An example of this is

photosynthesis.