Explanation

Water has maximum density at 4°C.

When Water is in its Solid form (Ice) below 0°C.

Explanation

To find the hidden secrets under the water,

the ships and submarines use the Sonar system.

Sonar uses sound waves to 'see' in the water.

There are two types of sonar—active and passive.

Explanation

The correct pathway of a nerve impulse is Receptors → CNS → Effectors. 

Receptors:

• These are specialized cells that detect stimuli (changes in the environment) like light, temperature, or pressure.
• They convert these stimuli into electrical signals.

CNS (Central Nervous System):

• This includes the brain and spinal cord.
• The sensory neurons transmit the electrical signals from the receptors to the CNS.
• In the CNS, the information is processed and a decision is made about how to respond.

Effectors:

• These are the organs or muscles that carry out the response.
• The CNS sends motor neurons to the effectors, which then trigger the muscle to contract or gland to secrete a substance. 

Explanation

Lipid synthesis is a function primarily carried out by the Smooth Endoplasmic Reticulum (SER) 

Intracellular digestion: Breaking down material ingested by the cell

Removal of waste: Digesting and removing cellular waste products 

Autophagy: Breaking down and recycling old or damaged cell components 

Explanation

- Color blindness is an X-linked recessive disorder.

- A color-blind female has two affected X chromosomes (XᶜXᶜ).

- A normal male has XY.

Cross:

- Female: XᶜXᶜ  

- Male: XY

Offspring:

- Sons receive Y from the father and Xᶜ from the mother → XᶜY = color-blind males

- Daughters receive X from the father and Xᶜ from the mother → XXᶜ = carrier females

Result:

- 100% of male children will be color-blind

- 0% will be normal males