Question

3 multiple choice 20 points
which of the following characteristics is unique to the organisms in the kingdom animalia?
they lack cell walls and are typically motile (can move) at some stage in their life cycle.
kingdom animalia is the only kingdom with eukaryotic organisms.
they are the only organisms that reproduce sexually.
they are the only types of organisms that are multicellular and heterotrophic.
4 multiple choice 20 points
what is the primary way organisms in kingdom archaea differ from those in kingdom bacteria?
bacteria cause diseases while archaea do not.
archaea and bacteria contain no differences, biologists are just weird when it comes to classification.
archaea live in extreme environments while bacteria are found pretty much everywhere on earth.
archaea are eukaryotic while bacteria are prokaryotic.

Explanation:

• Question 3:
• Option 1: Animals lack cell walls (unlike plants, fungi, and some protists) and are typically motile at some life - stage. This is a unique characteristic.
• Option 2: Kingdom Fungi, Plantae, and Protista also have eukaryotic organisms.
• Option 3: Many organisms (e.g., plants, fungi) reproduce sexually.
• Option 4: Fungi are also multicellular and heterotrophic.
• Question 4:
• Option 1: Some archaea can be associated with diseases (e.g., periodontal diseases in a limited sense), and many bacteria are beneficial.
• Option 2: Archaea and bacteria have significant differences (e.g., in cell - wall and membrane composition).
• Option 3: Archaea are often found in extreme environments (e.g., hot springs, high - salt environments), while bacteria are ubiquitous.
• Option 4: Both archaea and bacteria are prokaryotic.

Answer:

• Question 3: They lack cell walls and are typically motile (can move) at some stage in their life cycle.
• Question 4: Archaea live in extreme environments while bacteria are found pretty much everywhere on earth.