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Alekssandra [29.7K]
2 years ago
6

How did galileo find mountains on the moon?

Biology
1 answer:
bixtya [17]2 years ago
5 0
Watching The moon with his telescope
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Distinguish between innate and acquired immunity
mote1985 [20]

Answer:

Innate immunity you are born with.

Acquired immunity you need to work on over time

Explanation:

Poison ivy for example. Come people are born immune to it, while others have to be around it a lot, (agonizingly so), and they will build up immunity to it's poison.

5 0
3 years ago
Humoral immunity involves ________ cells and ___________
jarptica [38.1K]

Answer:

Humoral immunity involves <u>B cells</u> and<u> recognize antigens or pathogens in the lymph or blood.</u>

Explanation:

Humoral immunity is defined as the immunity which is mediated by several macromolecules presnet in the extracellular fluids such as antibodies, certain antimicrobial peptides, and  complement proteins.

Humoral immunity allows to distinguishes two groups of foreign substances. it involves <u>B cells</u> and<u> recognize antigens or pathogens in the lymph or blood. </u>

Humoral immunity begins when an antigens bind to B cells.  Interleukins or helper T cells provides a secondary signal to the B cells that activates a B cell and allows B cell proliferation.  which roduces produce plasma cells. The plasma cell then produces antibodies which are identical to the specific antigen. The antibodies are the released and circulate through the body, binding to antigens.  B cells the further produces memory cellss for future immunity.

So, Humoral immunity involves <u>B cells</u> and<u> recognize antigens or pathogens in the lymph or blood.</u>

8 0
3 years ago
What is the wavelength of a wave with a frequency of 0.4 kHz traveling at 16 m/s?
larisa86 [58]

Answer: 0.04metres

Explanation:

The wavelength of a wave is the distance covered by the wave after one complete cycle. It is measured in metres, and represented by the symbol λ

Recall that Velocity (V) = Frequency F x wavelength λ

V = F λ

Make λ the subject formula

λ = V / F

In this case Frequency = 0.4 kHz

Convert kilohertz to hertz by multiplying 0.4 by 1000 i.e (0.4 x 1000Hz) = 400Hz

Velocity of wave = 16 m/s

So, λ = V / F

λ = 16 m/s / 400Hz

λ = 0.04metres

Thus, the wavelength of a wave is 0.04metres

3 0
3 years ago
Read 2 more answers
Every 3 bases (a codon) in the RNA codes for 1 amino acid.
Oduvanchick [21]

Answer:

Lysine

Leucine

Serine

Glutamine

3 0
3 years ago
Darla was in an automobile accident that resulted in an injury to her brain. Her sense of touch has been affected. Which part of
Aleksandr-060686 [28]

Answer:

SENSORY CORTEX

Explanation:

The sensory cortex is the part of the brain that works on information referring to touch (called somatosensation) and other sense of feelings.

More specifically, the somatosensory cortex has a responsibility of processing touches in our body

7 0
2 years ago
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