Biology Chapter 5: Multicellular vs Unicellular

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Questions and Answers

Which characteristic is exclusive to multicellular organisms but never present in unicellular organisms?

Ability to reproduce
Organization into tissues and organs (correct)
Capacity to perform metabolic processes
Response to external stimuli

How do fungi obtain nutrients differently from plants?

Fungi produce their own food through photosynthesis.
Fungi synthesize nutrients from inorganic compounds.
Fungi consume other living organisms.
Fungi absorb nutrients from dead or decaying matter. (correct)

Which of the following best describes how cells work together?

Cells function independently without any interaction.
Cells of different organisms always cooperate for survival.
Cells organize to carry out life precesses (correct)
Cells compete for resources.

Which of the following is an example of a vertebrate?

Salmon (A) Signup and view all the answers

In what way are plants and animals similar?

Both are multicellular organisms. (C) Signup and view all the answers

Which of the following describes the main way that plants obtain food?

Photosynthesis (B) Signup and view all the answers

Why are most unicellular organisms studied using a microscope?

Because they are too small to be seen otherwise. (C) Signup and view all the answers

If a new organism is discovered that lacks a backbone and cannot perform photosynthesis, how would it be classified?

Invertebrate (C) Signup and view all the answers

What is the primary function of pseudopods in amoeba?

Engulfing food particles and eliminating wastes. (C) Signup and view all the answers

How do amoeba digest food after capturing it via phagocytosis?

By using enzymes within a food vacuole to break down the stored food. (A) Signup and view all the answers

How does gas exchange occur in unicellular organisms?

By diffusion of oxygen and carbon dioxide across the cell membrane. (D) Signup and view all the answers

Why is the ability of yeast to survive without oxygen useful in various industries?

It enables yeast to perform fermentation, which is essential in producing certain products. (B) Signup and view all the answers

How do unicellular organisms respond to their environment, given they lack complex sensory organs?

They detect changes through direct interaction with stimuli, such as chemicals or light, using specialized sensors. (C) Signup and view all the answers

How does 'movement' differ from 'locomotion' in unicellular organisms?

Movement describes changes in an organism's shape, while locomotion describes changes in an organism's position. (A) Signup and view all the answers

Which of the following best illustrates 'movement' in unicellular organisms?

An amoeba engulfing a bacterium using pseudopods. (C) Signup and view all the answers

How does exocytosis helps the amoeba?

It helps the cell eliminate waste (B) Signup and view all the answers

What is a key advantage of observing live paramecia under a microscope compared to prepared slides?

Live paramecia allow observation of natural behaviors and movements. (D) Signup and view all the answers

What is a drawback of using live paramecia for microscopic observation?

Their movement can make them difficult to observe and photograph. (A) Signup and view all the answers

How does cell specialization contribute to the complexity of multicellular organisms?

It allows cells to perform specific functions more efficiently, increasing overall functionality. (B) Signup and view all the answers

Which of the following best describes the relationship between tissues, organs, and organ systems in multicellular organisms?

Organs are made of tissues, which work together to form organ systems. (B) Signup and view all the answers

Why is the differentiation of cells essential for the development of multicellular organisms?

It allows cells to specialize and perform specific roles, leading to the formation of complex structures and functions. (B) Signup and view all the answers

Epithelial tissue is found...

covering external surfaces of the body and lining internal structures. (C) Signup and view all the answers

Skin is an organ comprised of...

epithelial, connective, nerve, and fat tissue. (D) Signup and view all the answers

How do plant tissues differ based on their primary function?

Tissues that carry water and nutrients are thin-walled, while tissues providing structure are thick-walled. (C) Signup and view all the answers

If the respiratory system is not functioning efficiently, which of the following is the MOST likely direct consequence, according to the text?

The circulatory system will not effectively transport blood cells to the lungs for carbon dioxide removal. (C) Signup and view all the answers

Which of the following best describes how humans obtain nutrition based on the provided text?

Humans consume living things or products from living things to obtain nutrients. (B) Signup and view all the answers

In the human digestive system, what is the PRIMARY role of the stomach, as described in the text?

Breaking down food through chemical and muscular action. (D) Signup and view all the answers

How do nutrients absorbed in the intestine eventually reach other parts of the human body?

They are transported via the circulatory system. (B) Signup and view all the answers

Which structure in the earthworm digestive system is MOST analogous to the function of teeth in the human digestive system?

Gizzard (A) Signup and view all the answers

What is the function of the crop in the earthworm's digestive system?

To moisten and store food before digestion. (B) Signup and view all the answers

Based on the information provided, how does the nutritional strategy of plants differ most significantly from that of animals?

Plants cannot hunt for nutrients and must absorb them from their environment. (B) Signup and view all the answers

Which of the following processes occurs in both human and earthworm digestive systems?

Nutrient absorption in the intestine. (C) Signup and view all the answers

What is the primary function of xylem vessels in plants?

To transport water and minerals from the roots to other parts of the plant. (A) Signup and view all the answers

Which process do plants use to create food using sunlight, carbon dioxide, and water?

Photosynthesis (B) Signup and view all the answers

In what form do plants store excess sugars that are produced during photosynthesis?

Sugars (C) Signup and view all the answers

What is the function of phloem vessels in plants?

Transporting food from the leaves to the rest of the plant. (B) Signup and view all the answers

How do earthworms obtain oxygen from their environment?

Through moist skin. (B) Signup and view all the answers

What structures in the human respiratory system branch off into smaller tubes called bronchioles?

Bronchi (B) Signup and view all the answers

In the human respiratory system, where does gas exchange primarily occur?

Alveoli (C) Signup and view all the answers

What specialized structures do plants use for gas exchange?

Stomates (A) Signup and view all the answers

How do earthworms move through the soil?

They anchor themselves with hair-like projections and use muscle contractions to pull themselves forward. (A) Signup and view all the answers

Which of the following is NOT a typical role of unicellular organisms?

Synthesizing complex proteins for muscle development in animals. (C) Signup and view all the answers

What crucial role do fungi and bacteria play in the environment?

Decomposing organic material and recycling nutrients. (D) Signup and view all the answers

How do some bacteria contribute to plant health?

By converting atmospheric nitrogen into a usable plant fertilizer. (A) Signup and view all the answers

What is the role of yeast in the food industry?

Producing breads and pastries through fermentation. (A) Signup and view all the answers

How does penicillin, an antibiotic, originate?

It is derived from a specific type of fungus. (A) Signup and view all the answers

In type 1 diabetes, what is the primary malfunction?

Cells in the pancreas do not produce enough insulin. (A) Signup and view all the answers

How do people with type 2 diabetes typically manage their condition?

By regulating blood sugar levels with diet and exercise. (B) Signup and view all the answers

Flashcards

Organism

A living system composed of smaller parts working together.

Unicellular organism

An organism made up of a single cell.