Explanation

Explanation

Robert Brown discovered the nucleus in plant cells.

It was first described by Franz Bauer in 1804 and in more detail in 1831 by Scottish botanist Robert Brown.

Explanation

Gymnosperms are plants with "naked seeds," meaning their seeds are not enclosed within a fruit.

This group includes conifers like pine trees.

Explanation

Explanation

Caffeine occurs naturally in the tea plant,

Camellia sinensis, so all brewed tea contains some caffeine. 

Tea leaves contain 3.5% caffeine,

while

Coffee beans have 1.1–2.2%.

Explanation

Most  eucalyptus trees grow much faster than other trees

Some eucalyptus species can grow 6 to 12 feet per year. 

Eucalyptus trees thrive in warm climates with sufficient water and sunlight. 

Eucalyptus trees are widely cultivated for their timber, essential oils, and ornamental value. 

Explanation

Soil fertility can be maintained without adding extra nutrients due to microbial activity.

Microbes increase the amount of nutrients in the soil that are available to plants

Explanation

Explanation

Zingiber officinale is the scientific name for ginger.

It is a commonly used spice and medicinal root.

It belongs to the Zingiberaceae family and grows as an underground stem (rhizome).

Explanation

Carbohydrates provide the quickest source of energy for athletes.

As they are rapidly broken down into glucose, which fuels muscles during physical activity.

This makes them ideal for boosting performance and stamina.