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Mice21 [21]
3 years ago
11

If a girl is standing in front of a smooth surface from which a sound is reflected, the girl may hear

Biology
2 answers:
belka [17]3 years ago
7 0
D. T<span>wo similar sets of sounds if she is also near the source of the sound. 

Just took the test, got it right! =]</span>
katen-ka-za [31]3 years ago
5 0

The correct answer is option D.

If a girl is standing in front of a smooth surface from which a sound is reflected, the girl may hear two similar sets of sounds if she is also near the source of the sound.

For proper reflection of all sorts of energy waves, a hard flat surface is preferable. This helps to reflect waves without losing energy. Hard and smooth surfaces are best for travelling of sound waves because sound is related to pressure.

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The raw material used by plants during photosynthesis N2and O2 O2,H2 and CO2 CO2 and water water and minerals​
strojnjashka [21]

Answer:

Thus, the correct answer is 'Carbon dioxide, water, and sunlight'.

3 0
3 years ago
A man with type A blood marries a woman with type
JulsSmile [24]
The pattern of inheritance is called codominance when the father has type A and the mother has type B and the kids have type AB blood. This is when the both of the alleles will show equal dominance/impact after mating. The type A blood has the gene pattern iAi or iAiA. The type B blood has the gene pattern iBi or iBiB. The correct answer to this question is "codominance." 
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Synovial fluid Select one: a. is a double layer of tissue that encloses a joint. b. is a thin lubricating film covering the surf
Advocard [28]

Answer:

The correct answer will be option- B.

Explanation:

Synovial fluid is a clear slippery fluid which is present in the synovial cavity.

The synovial fluid helps the nourishment as it provides nutrients to the and oxygen to the hyaline cartilage of the bones as well as the lubrication of the cartilage surfaces due to the viscous nature like oil which lubricates the piston.

This smooth surface facilitates the smooth and painless movements between the bones, therefore, the Option-B is the correct answer.

4 0
3 years ago
Which type how many chromosomes are in a normal human karyotype?
Bumek [7]
Each human cell contains 46 chromosomes.
5 0
3 years ago
Read 2 more answers
Generally, the hormones secretin and cholecystokinin which are released by duodenal enteroendocrine cells will ________. decreas
aniked [119]

Answer:

c. increase the release of digestive enzymes and bile

Explanation:

Secretin and cholecystokinin are hormones produced in the duodenal region of the small intestine. They are both involved in the release of digestive enzymes and bile.

Secretin is actively involved in controlling the pH of the chyme when it enters the duodenum from the stomach. It does so by inhibiting the release of gastric acid from the parietal cells in the stomach. Secretin induces the release of sodium bicarbonate ions from the pancreas which help to increase the pH of the chyme. This hormone also stimulates the secretion of bile.

Cholecystokinin (CCK) stimulates the contraction of the gallbladder and the release of bile into the duodenum. CCK also acts on the pancreas, stimulating it to produce pancreatic juices for digestion.

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3 years ago
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