Explanation

Meninges are the three protective membranes (dura mater, arachnoid mater, and pia mater) that surround the brain and spinal cord.

They help protect the central nervous system and contain cerebrospinal fluid (CSF).

Explanation

Cyclic ethers containing two ether groups are called crown ethers.

These compounds have a ring structure with multiple oxygen atoms, forming a "crown-like" shape that can bind to metal ions. 

Explanation

Hydrolysis of one mole of ATP to ADP and inorganic phosphate releases approximately 7.3 Kcal of energy.

This energy is used to power various biological processes in cells.

Explanation

Alkanes are saturated hydrocarbons containing only single covalent bonds between carbon atoms.

They follow the general formula CnH2n+2.

It include compounds like methane, ethane, and propane.

Explanation

A nucleophile is a chemical species that is attracted to positive charges, especially the nucleus.

It donates a pair of electrons to form a chemical bond, often attacking electrophilic centers.

Explanation

Alkenes are commonly known as Olefins due to their ability to form oily liquids when reacting with chlorine.

They are unsaturated hydrocarbons containing at least one carbon-carbon double bond (C=C).

Explanation

Passage

I grew up in the south of Spain in a little community called Estepona. I was 16 when one morning my father told me I could drive him into a remote village called Mijas, about 18 miles away, on the condition that I take the car in to be serviced at a nearby garage.

1. The first sentence of the passage is in _____?

Past tense

2. Condition is a _____ in thi passage.

Adverb

Explanation

Gastric juice is composed of approximately 90% water, which helps dissolve food and enzymes.

The remaining 10% includes hydrochloric acid, enzymes like pepsin, and mucus.

Explanation

Marijuana is derived from the dried parts (flowers, stems, seeds, leaves) of Cannabis sativa.

It contains psychoactive compounds like THC.

Explanation

Potassium (K) regulates stomatal opening/closing by controlling guard cell turgidity, reducing water loss (transpiration).

It maintains osmotic balance.