Impact of Increased CO2 on Biosphere

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What is the function of the nucleolus in a cell?

Regulating cell growth

Cell division

Protein synthesis (correct)

Producing DNA

During which phase of the cell cycle do chromosomes appear unwound and jumbled?

G2 phase

G1 phase (correct)

S phase

M phase

Which elements make up 96% of living matter?

Calcium, phosphorus, potassium, sulfur

Sodium, chlorine

Carbon, hydrogen, oxygen, nitrogen (correct)

H, O, N, C

What is the main difference between an element and a compound?

Elements cannot be broken down chemically, compounds can be broken down easily Signup and view all the answers

Which organelle is known as the cell's protein-producing structure?

Nucleolus Signup and view all the answers

Why are trace elements important for living organisms?

They are required in small quantities for normal physiological functions Signup and view all the answers

What is the main difference between unicellular and multicellular organisms?

Functions of the cells Signup and view all the answers

How are prokaryotes different from eukaryotes?

Presence of nucleus Signup and view all the answers

Which term describes a single-celled organism lacking a true nucleus?

Prokaryote Signup and view all the answers

What are the basic components of a eukaryotic cell as observed under a light microscope?

Cell Membrane, Cytoplasm, Nucleus Signup and view all the answers

Which feature is common to all cells?

Cytosol being crowded Signup and view all the answers

What is the distinguishing feature between eukaryotic and prokaryotic cells regarding the nucleus?

Nuclear materials are separated from cytoplasm in eukaryotes Signup and view all the answers

What is the importance of interactions between organisms and their environments?

Both organisms and their environments are affected by these interactions Signup and view all the answers

How does a tree contribute to the environment?

Releasing oxygen into the air Signup and view all the answers

What major processes are involved in the dynamics of an ecosystem?

Flow of energy and cycling of nutrients Signup and view all the answers

In what form does energy usually enter an ecosystem?

Chemical energy Signup and view all the answers

Why is the structure and function of living organisms closely related?

Structure and function of living organisms are closely related Signup and view all the answers

What is the lowest level of organization that can perform all activities required for life?

Cell Signup and view all the answers

What type of cells do bacteria and Archaea belong to?

Prokaryotic cells Signup and view all the answers

What differentiates eukaryotic cells from prokaryotic cells?

Presence of a nucleus in eukaryotic cells Signup and view all the answers

What role does DNA play in all cells?

Genetic information in all cells Signup and view all the answers

What is the basis for reproduction, growth, and repair in multicellular organisms?

Ability of cells to divide Signup and view all the answers