Explanation

• The cell wall is a thick, permeable layer that surrounds the plant cell.
• It provides support, protection, and shape.
• It is composed of cellulose, hemicellulose, and pectin.
• It is responsible for maintaining the cell's rigidity and structure.

Explanation

Dicot plants are characterized by:

• Leaves with netted venation
• Seeds with two cotyledons
• Flowers with four or a multiple of four floral leaves

Having leaves with parallel venation is actually a characteristic of monocot plants, not dicots.

Explanation

For diagnostic purposes, to reach the liver, a dye would typically be injected into the portal vein

Which supplies the liver with nutrient-rich blood from the gastrointestinal tract.

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The ligamentum teres is a remnant of the fetal umbilical vein and does not serve as a current blood vessel.

Explanation

In rheumatoid arthritis, radiological findings commonly include bone erosions

Which can appear as bony spikes or irregularities at joint margins.

Explanation

• Human beings are omnivores because we eat a variety of foods including plants (fruits, vegetables, grains), animals (meat, poultry, fish), and products derived from animals (dairy, eggs).

Explanation

• Cat is a secondary consumer because it eats primary consumers (birds and mice).
• Which are herbivores that eat plants and plant products.

Explanation

Sodium deficiency, also known as hyponatremia, can lead to:

• Imbalances in fluid volume in the vessels and tissues
• Fluid retention and swelling
• Muscle cramps
• Weakness
• Fatigue
• Seizures (in severe cases)

Explanation

Pine trees are called evergreens

Because they do not shed their leaves, which are pine needles. 

The most common species of softwood timber available is pine.

This is available in both treated and non-treated varieties.

Explanation

• Chlorosis in older leaves occurs due to the deficiency of Magnesium.
• Chlorosis is a condition in which the leaves produce an insufficient amount of chlorophyll, causing yellowing of the leaves.
• Magnesium is the main component of chlorophyll, so its deficiency causes insufficient production of chlorophyll in leaves.

Explanation

• The condition caused by a deficiency of niacin is called pellagra.
• Pellagra is a systemic disease that affects the skin, mouth, bowels and brain.
• The condition is usually caused by a poor diet, but it can also be caused by other health conditions that prevent the body from absorbing or using niacin.