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Kobotan [32]
3 years ago
14

A bird flies by moving its wings up and down. Which two systems are most directly responsible for the movement of a bird's wings

?
A.
skeletal and muscular systems
B.
respiratory and muscular systems
C.
skeletal and digestive systems
D.
respiratory and digestive systems
Biology
2 answers:
aleksklad [387]3 years ago
4 0
A. Skeletal and muscular
the other three don’t have to do with this type of internal movement though as the abdominal region and internal organs don’t have to do with this, A is the only possible answer
dsp733 years ago
3 0

Answer:

The answer is A.  skeletal and muscular systems

Explanation:

the skeletal muscle systems is responsible for  the movements of many of the vertebrate living beings. The skeleton of the birds is highly adapted for the flight. It is extremely light in weight but strong enough to withstand the stress of takeoff, flight and landing. The largest muscles in the bird are the pectorals, which control the wing; these provide the powerful blow of wings, essential for the flight.

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Tell me one thing you know about replication.
olchik [2.2K]

Answer:

DNA replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules. Replication is an essential process because, whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell.

Thats one thing ;)

8 0
3 years ago
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Think about how acids and bases would affect the water quality in the two lakes. which set of ph data would you expect to see ba
myrzilka [38]

Water first-rate has significantly laid low with the presence of acid and base within the water. So answer is lake a: ph = 6.6; lake b: ph = 6.8.

The water isn't always precise for fitness whilst its exceptionally acidic or exceptionally basic. If the pH of water is almost impartial, this water is nice for consuming purpose. In the choice 3, each lake A and lake B has pH almost impartial so this water reasons no awful impact at the fitness of the human body. Highly acid water has low water first-rate because of the presence of metals which adversely have an effect on our body.

<h3>What is pH of lake water ?</h3>

The pH degree of the water in rivers, lakes, and wetlands is critical to plant and animal life is 7.

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Hence explained.

To learn more about the acids refer link :

brainly.com/question/25148363

8 0
2 years ago
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What is the levels of kinetic energy in the particles in each state of matter
SSSSS [86.1K]

Solids, liquids, gases, and plasmas: these words should be quite familiar to you because they are the four phases of matter, which are simply the different forms matter can take on. What's neat is that many substances can exist as more than one phase. Take water, for example: water can exist as a solid (ice), a liquid (liquid water), and a gas (water vapor).

The difference between these states is the amount of energy. Solids have the least amount of energy, which is part of why their particles hang so tightly together. Liquids have more energy than solids, which is why they will take on the shape of their container but only up to the surface.

Gases have even more energy than liquids. So much more in fact that their particles spread out to fill the entire space of their container. Gas particles have so much energy that they just can't keep still. They fly around in all directions, putting as much distance as possible between themselves and the rest of the gas particles.

Plasmas are ionized gases, and in their natural form are uncommon on Earth. You've seen them as man-made things, like neon signs and fluorescent light bulbs. But in the rest of the universe, plasma is actually the most common phase of matter! Most stars are plasma, as are the northern lights you see around the Polar Regions. Plasma only exists under certain conditions though, so we'll end our discussion of it here for this lesson.

7 0
3 years ago
Two methods of testing that would be more accurate than litmus paper
Kay [80]

Answer:

pH meter and pH paper.

Explanation:

There are a few other ways that are commonly used, including titration, but most are tedious and require detailed hands-on work. A pH meter is normally assisted by the use of a computer or a digital user interface. The use of pH paper can be likened to the use of a Galileo thermometer.

3 0
2 years ago
Two short-haired guinea pigs have several offspring over the course of a few years. Out of 100 offspring, 25 of them have long h
Llana [10]

The genotype of the short-haired parents that produced some long hair offsprings is probably heterozygous.

<h3>What is heterozygosity?</h3>

Heterozygous means an organism which has two different alleles of a given gene.

An organism that is heterozygous posseses two different alleles of the same gene. For example, in this gene coding for hair length;

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Therefore, if two short-haired parents produce 100 offsprings and 25 of them are long-haired, it means that they were probably heterozygous for the short hair.

Learn more about genotype at: brainly.com/question/12116830

#SPJ1

7 0
2 years ago
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