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n200080 [17]
3 years ago
5

Ducks have waterproof feathers that help maintain their body temperature. Which body system are these characteristics a part of?

Biology
2 answers:
denis-greek [22]3 years ago
8 0

E: integumentary. hope this helps

ki77a [65]3 years ago
5 0

Answer:

E. integumentary

Explanation:

The integumentary system is consisted of hair, feathers, skin, glands, nerves, nails, with its main function being to act as a protective barrier of the body from the outside world. It helps in regulation of the body temperature, retaining body fluids, elimination of waste products, and protection form diseases. The waterproof feathers of the ducks are a nice example of this. They manage to keep their bodies warm in the water, thus helps them a lot in the regulation of the body temperature by being a barrier between the body and the water.

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Using the following biomass data determine which groups is most likely to represent the producers in an area
Vsevolod [243]

Answer:

The correct answer would be group D- 809 kg.

It can be explained with the help of pyramid of biomass.

Pyramid of biomass represents biomass or the amount of organic or living matter present at each trophic level in an ecosystem.

The amount of organic matter is usually expressed in grams per meter square (g/m²).

There are usually four trophic levels in the pyramid of biomass: primary producers, primary consumers, secondary consumers, and tertiary consumers.

Usually, the biomass decreases as we go up the trophical levels specially in  terrestrial ecosystem. Inverted pyramid can be observed in case of aquatic ecosystem (biomass of phytoplanktons is less than that of herbivores).

Here, maximum biomass (809 kg) belongs to the group D and hence, it would belong to primary producers.

5 0
3 years ago
Which fossil occurs on the most landmasses what does this suggest about when the continents broke up
Zepler [3.9K]

Answer:

Glossopteris and Lystrosaurus

Explanation:

Glossopteris is an ancient plant flora and Lystrosaurus is a fossil fauna, and both are found in many of the landmasses on earth. The Glossopteris flora appeared about 300 to 200 million years back and the Lystrosaurus appeared about 250 million years back on earth. They both existed from the time of late Permian to early Triassic age.

Both these fossils played an important role in understanding the continental drift theory or the plate tectonic theory. This evidence enabled geologists to understand how the continents have moved across the large ocean basin from one place to another and at what rate they are drifting currently. It helped in understanding how the super-continent Pangaea had broken into Laurasia and Gondwanaland, and further broken into the present location of the plates.

8 0
3 years ago
Is most of South America's trees tropical trees?
Oliga [24]
The most common tree in that continent is one that's named "floss silk". It's classified as a tropical tree so we could say that most of South America is covered in tropical trees.

Have a nice day! :)
8 0
4 years ago
The portion of a muzzleloader rifle that fits against your shoulder is the
asambeis [7]

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A muzzle-loader is a firearm in which the projectile and usually the propellant charge is loaded from the muzzle of the gun. This is distinct from the more popular modern designs of breech-loading firearms. That portion of a muzzle-loader rifle that fits against ones shoulder is called the butt.

6 0
3 years ago
A uranium-235 sample starts with 200 atoms, and 700 million years later,
Solnce55 [7]
I think it 700 million years because I took the same question and that’s what I put.
3 0
3 years ago
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