A1.1 Water IB Biology

Front

Where did the first cells originate?

Back

In water.

Front

What causes the polarity of water molecules?

Back

Unequal sharing of electrons in polar covalent bonds.

Front

How does cohesion of water molecules affect transport in plants?

Back

Water is transported under tension in xylem.

Front

What is an example of adhesion in plants?

Back

Capillary action in plant cell walls.

Front

Why is water important in metabolism?

Back

It dissolves a wide variety of hydrophilic molecules.

Front

How does water's specific heat capacity affect aquatic animals?

Back

It buffers temperature changes, which is crucial for aquatic organisms.

Front

What are the hypotheses for the origin of water on Earth?

Back

From asteroids, due to impacts during Earth's early history.

Front

Why is the presence of water crucial in the search for extraterrestrial life?

Back

Water is essential for life as we know it, influencing where life might exist beyond Earth.

Front

Why is water considered the medium for life?

Back

It is essential for most biological processes and serves as the environment where life occurs.

Front

What is the role of water in cellular processes?

Back

Water acts as a solvent and medium for metabolic reactions.