Explanation

When a sound wave moves from one medium to another, the quantity that remains the same is its frequency. 

The frequency of a sound wave is determined by the source of the sound and doesn't change when it enters a different medium.

However, the wavelength and speed of the wave can change depending on the properties of the new medium. 

Explanation

A centripetal force always acts perpendicular to the direction of an object's motion.

Meaning it doesn't contribute to the object's speed or change in kinetic energy, which is the definition of work. 

Explanation

According to Newton's second law, 

F=ma, a constant non-zero force results in uniform acceleration of the mass.

Explanation

The time rate of change of magnetic flux has the same dimensions as that of potential difference (or electromotive force - EMF). 

Explanation

Endometriosis is a condition where tissue similar to the lining of the uterus grows outside the uterus.

This tissue can cause pain and infertility, primarily in women.

There is very strong evidence linking endometriosis to female infertility.

Studies show that a significant portion of women with infertility also have endometriosis.

While endometriosis can rarely occur in men, it is not considered a significant cause of infertility in males. 

Explanation

Bacillus bacteria:

These are rod-shaped, Gram-positive bacteria that can form endospores. 

Pseudomonas:

These are Gram-negative bacteria, not bacilli. 

Clostridium:

These are also Gram-positive bacteria, but they are anaerobic, unlike most Bacillus species. 

Salmonella:

These are Gram-negative bacteria, not bacilli. 

Streptococcus:

These are Gram-positive cocci (round bacteria), not bacilli. 

Explanation

Testosterone, estrogen, and progesterone are derived from cholesterol, making them steroid hormones.

They are lipid-soluble, diffuse through membranes, and regulate reproduction.

Explanation

The type of nerve impulse in a non-myelinated neuron is continuous. 

In unmyelinated neurons, the action potential travels along the entire axon membrane, requiring continuous depolarization and repolarization.

Whereas in myelinated neurons, the action potential "jumps" from node to node (saltatory conduction), which is much faster. 

Explanation

Explanation

Alveoli:

Bronchioles terminate in tiny air sacs called alveoli.

These are the primary sites for gas exchange in the lungs. 

Alveolar sac:

Alveoli are clustered together to form alveolar sacs.

These sacs are the functional units of the lung where oxygen and carbon dioxide exchange occurs.