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2 years ago

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

2 answers:

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]2 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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Arrange these elements of the intrinsic conduction system in the order that a depolarizing impulse travels during a normal heart

zlopas [31]

Answer:

SA Node

Inter-nodal Pathways

AV Node

AV Bundle

Bundle Branches

Purkinje Fibers

The SA nodes functions first for setting pace for the heart, then the inter-nodal pathway make link b/w SA and AV node. AV node is site of delay when contraction of atria occurs. AV bundle is the mean of electrical link b/w atria and ventricle. The conveying of impulse to the inter-ventricular septum occurs through bundle branches, while conveying of impulse throughout and along the walls of ventricle occurs through Purkinje fibers.

7 0

2 years ago

ancestors of giraffes with shorter necks could not reach branches high up in trees for food. this led to selection for longer-ne

hichkok12 [17]

With shorter necks, giraffe ancestors could not reach food-containing branches on tall trees. This resulted in the directional selection of giraffes with longer necks.

<h3>Why is choosing a direction necessary? </h3>

It nearly appears obvious that the giraffe's long neck developed as a result of a lack of food in the lower branches of trees. The giraffe has a significant advantage because it is taller than any other mammal and can feed where few others can.

When compared to modern giraffes, the giraffe's ancient predecessors had a shorter neck. The plants that were lying at a higher level were inaccessible to them. Giraffe phenotypes have changed in various ways, and now have long necks to reach vegetation that is higher up. The extreme form is chosen above other features in directional selection. It was decided to choose the long-necked giraffe over the short-necked.

To know more about direction selection for longer necked giraffes visit:

brainly.com/question/3738222

#SPJ4

7 0

1 year ago

So just how did pattern on a giraffe's body increases his chances of survival

Agata [3.3K]

Answer:

survival of young giraffes is related to spot pattern, which might help provide camouflage from predators. ... This study revealed that newborn giraffes with larger spots and irregularly-shaped spots had increased survival during the first few months of life.

Explanation:

6 0

2 years ago

1. How would an investigator process patent(direct) prints?

Katena32 [7]

Patent fingerprints are made by a liquid or powder that sticks to the finger and then transfers to a surface, leaving an easily visible fingerprint behind. Substances that can leave patent fingerprints are ink, blood, dirt, flour, grease, etc.

4 0

2 years ago

Someone help me asap!!!!

leva [86]

Answer:

1 and 3

Explanation:

If you look at it the same things they have are

Phylum - Chlordata

Class - Mammalim

Order - Carnirvora

Family - Felidae

Genus - Felis

(sorry if i spelt something wrong, i cant really read it that well)

5 0

1 year ago