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Answer:

The best and most correct answer among the choices provided by your question is the fourth choice or letter D "The thin membrane that closes the cavity of the middle ear from the outside changes position."

Your ears pop in airplanes because the air high above the surface of Earth is less dense than air near the surface, because air near the surface has all the air above it pushing down. Your inner ear has air trapped in it and as the atmospheric pressure changes, it causes pressure on your eardrum.

I hope my answer has come to your help. Thank you for posting your question here in Brainly.

Explanation:

Answer: B - Thicker layer of blubber

Explanation: Seals are well adapted to cold polar environments with thick blubber layers that act both as a food reserve and insulation. Most seals also have a layer of fur, giving additional insulation on land.

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Answer:

1. B mass/distance

2. B Gravitational attraction between the sun and Venus

3. A All objects would fly off into space

4. B Axis

5. A Rotation

6. A Increases

7. B Decreases

8. When there is no force acting on an object, it won’t change it’s path and will keep going straight until another force acts upon it.

Answer:

polymorphonuclear leukocytes

Answer:

Explanation:

1 to 8 km/sec- use this to work out 10 minutes

Answer:

Hi There!

Explanation:

1 to 8 km/sec

S-waves are transverse waves. Even though they are slower than P-waves, the S-waves move quickly. Typical S-wave propagation speeds are on the order of 1 to 8 km/sec. The lower value corresponds to the wave speed in loose, unconsolidated sediment, the higher value is near the base of Earth's mantle.

An antibiotic is designed to kill bad cells to help aid illnesses. However, a pathogen is like a virus or a bacteria that can give a disease. Doctors observe pathogens on a atomic and cellular level to alienate the pathogens weaknesses and what does or doesn't kill it. An antibiotic is commonly used to kill these pathogens and prevent infections.

Basically, the big difference between an antibiotic and a pathogen, is that an antibiotic is used as a source of protection and a pathogen is a seperate living virus (disease). Both are key components of finding cures for harmful viruses and illnesses.

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.  。    •  　ﾟ  。  　.  　.      .    　。   。　.  .   。  ඞ ඞ ඞ ඞ ඞ ඞ ඞ 。  . • . [Northstar] was ejected. . .   。　.    　。      ﾟ  　.    　. ,    .  .   .

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Notice that the equation for cellular respiration is the direct opposite of photosynthesis: Cellular Respiration: C 6 H 12 O 6 + 6O 2 → 6CO 2 + 6H 2 O. Photosynthesis: 6CO 2 + 6H 2 O → C 6 H 12 O 6 + 6O.

Answer: A  mutation Changes by its mistake in the DNA which results in the wrong amino acid being incorporated into a protein because of change, that single DNA sequence change, results in a different amino acid codon which the ribosome recognizes.

Explanation:

A mutation changes the instructions of a gene, which can also change the protein. Sometimes this change makes it so the protein can't do its job as well. And this is what happens with sickle cell anemia. A mutation in the hemoglobin gene changes the hemoglobin protein in a way that causes sickle cell anemia.

Answer:

because the toxic of it can burn your skin the toxic of acid is very dangerous so we couldn't touch it if we touch it our skin or your skin will burn or turn it into ashes

Answer:

c

Explanation:

Answer:

revolution

...................

A revolution is the equivalent of one entire orbit around something

(ie, earth around sun/ moon around earth) and is the equivalent of one year.

Answer: A REVOLUTION is the orbiting of an object around another body.

Explanation: revolution- the orbiting of an object around another object. One complete revolution around the sun is called a year.

A chemical reaction is a process where two or more reactants are converted to one or more products at a given rate, which requires a minimum amount of energy.

In conclusion, a chemical reaction is a process where two or more reactants are converted to one or more products at a given rate, which requires energy. These reactions can be exothermic processes or endothermic processes.  

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Explanation:

i think the fatty acid because amino acids are also the fatty acids

Answer: B. sperm cell and egg cell

Explanation:

Answer: see below

Explanation:

So, kinetic energy means an object is already in motion. Potential energy, means an object has the potential to transfer energy but is idle. Mechanical energy is something like a wheel turning. That is also correlated with kinetic energy. Which in turn, means when a wheel rotates, the object is in motion. Therefore transferring energy.

Answer: Only about 10% of energy is transferred from one trophic level to the next. Most of the rest of the energy is lost through heat (energy expended, metabolic process, respiration) as it transfers along each level. The reason for this energy loss is found in the second law of thermodynamics which states: that as energy is transferred energy is lost.

Explanation: You're Welcome!

Answer: B.

Explanation:

Answer:

B) Between adenine and thymine in DNA

Explanation:

A hydrogen bond would be found between adenine and thymine in DNA.

Peptide bonds- found in proteins

Covalent bonds - found in the backbone of nucleic acids

Glycosidic links - found in carbohydrates such as sucrose

Therefore, the only answer left, after you cross out the other from the information above, is B: Between adenine and thymine in DNA

Answer: C - Ridge

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Answer:

Shape and size?

Explanation:

Answer:

option B ,is correct answer of this question

Answer:

B

Explanation:

Answer:

Non living things can be classified into

They exist in nature or are made by living things. There are three groups of nonliving things. They are solids, liquids, and gases.

Explanation:

Answer:

D / D / D / B / C

Explanation:

I just took the quick check myself, got all of them right :)

1 ) Top predators do not increase the number of prey, neither do they create imbalance or increase the food for other predator species. This is common knowledge, so ruling those out you are left with D. As they do in fact maintain the rest of the food chains populations.

2) A top predator in the ocean is a shark. Of course some might mistake a small whale to be a top predator, but sharks are actually known to hunt whales- the small ones anyway. A sea lion fish or a bird wouldn't exactly be a candidate for the top of the food chain either.

3) During seasonal flooding, to an area such as a river, water gets added to the existing pool, and many biotics and abiotics take this to their advantage. As a result- biodiversity actually increases during these times, but once season flooding is over it goes back to being the same.

4) The impact difference of seasonal flooding from damming a river is actually quite big. Seasonal flooding is.. well.. seasonal.. while damming for the most part is permanent, or will be there for much longer time span than season flooding is. Seasonal flooding increases biodiversity, but damming does not. This is becuase of the long term increase of water, the environment has to readapt, as plants that were once there drowned, and the known species most likely ran off to find better environment. Here it takes a while but eventually new abiotic and biotic species adapt and reclaim the dammed area of the environment.

5) Yes, a long term increase in the average temperature would disturb the ecosystem. Even if it's for a little bit, it's still something the environment wouldn't be used to, meaning the plants and animals there would have to learn to adapt for the time being- even if its temporary.

1: It maintains other populations

2: A shark

3: The biodiversity of the area increases

4: Seasonal flooding does not impact biodiversity for as long term as damming.

5: Yes, because such a change could have a large-scale impact on wildlife.

Answer:

Leukocytes

Explanation:

Leukocytes = White blood cells that digest foreign particles

Answer:

2. octopuses

Explanation:

A cephalopod is any member of the molluscan class Cephalopoda such as a squid, octopus, cuttlefish, or nautilus.

Octopuses belongs in class Cepholopoda. So, the correct option is (B).

A cephalopod is defined as any member of the molluscan class Cephalopoda such as a squid, octopus, cuttlefish, or nautilus where specifically marine animals with bilateral body symmetry, a prominent head, and arms modified from primitive molluscs or is characterized by a set of tangents foot. These animals use gills to breathe and are invertebrates (lack backbones).

Cephalopods are most notable for their many arms and soft bodies, while ancestral cephalopods are known mostly from their shells because they are well preserved as fossils. The octopus, squid, cuttlefish, and chambered nautilus are familiar representatives.

Thus, Octopuses belongs in class Cepholopoda. So, the correct option is (B).

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Answer:

A temporary lake create salt flats in Death Valley when Holocene lakes began to evaporate.

Explanation:

"Each time it has rained since, a new layer has been added. The flat is a vast area covered in salt that was deposited from evaporated water. When the water runs down the mountain, it dissolves minerals that precipitate out as the water evaporates."

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Have a supercalifragilisticexpialidocious day!

Explanation:

what's the lesson can u show uss

Answer:

whats the lesson? You cant just write a lab report out of the blue what is the lab about?

Explanation: