Explanation

Leucocytes are also known as white blood cells.

They are colorless, irregularly shaped, nucleated cells that are larger in size compared to red blood cells (RBCs).

They play a vital role in the immune system, helping to fight infections and diseases.

Explanation

The G1 phase (Gap 1 phase) is the period of extensive metabolic activity in the cell cycle where the cell grows, enzymes are synthesized, and DNA is replicated.

This phase is also known as the interphase or the growth phase.

Explanation

Deductive reasoning is a type of logical reasoning that uses "if-then" statements to arrive at a conclusion.

It involves making a logical deduction based on a premise.

It is used in scientific reasoning to test hypotheses and predict outcomes.

Explanation

The scientific method is a systematic approach used to develop and test scientific knowledge, including in biology and other sciences. It involves:

• Observations
• Hypothesis formation
• Prediction
• Experimentation
• Data analysis
• Conclusion drawing

Explanation

• The evaporation of water from the leaves, also known as transpiration, creates a negative pressure that pulls water up the xylem from the roots to the leaves.
• This process is known as the transpiration-cohesion theory.

Explanation

• A proportion is an equation that states that two ratios are equal.
• It is often written in the form: a/b = c/d
• Where a, b, c, and d are values or quantities, and the ratio a/b is equal to the ratio c/d.
• For example: 2/4 = 3/6

Explanation

• Proportion is a mathematical concept, not a step in the biological method.
• The biological method involves observation, data collection, and experimentation to develop and test hypothesis.

Explanation

• Members of the same species form a population, not members of different species.
• A population is a group of individuals of the same species that live in a specific geographic area and can interbreed.

Explanation

Thalassemia is a genetic disorder that affects the production of hemoglobin, a protein in red blood cells that carries oxygen to the body's tissues.

It is characterized by abnormal hemoglobin production, leading to anemia, fatigue, and other complications.

Explanation

Macronutrients are the nutrients that are needed in the highest concentration by living organisms.

They include carbohydrates, proteins, and fats, which provide energy and support growth and maintenance of tissues.