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2 years ago

Does the nematode have an incomplete digestive system or a complete digestive system? Explain

Biology

1 answer:

brilliants [131]2 years ago

7 0

Answer:

Nematodes have a complete digestive system

Explanation:

Phylum Nematodes are also termed as roundworms. Nematodes have a complete digestive tract starts from the mouth and ends in anus.

components of Digestive tract: Stomoddeum where mouth opening oesophagus lies and the buccal cavity and the other end is the proctodeum,from here the waste exits. In between the two openings is a intestine a tube like structure,no stomach.These are the components involved in a complete digestive system of nematodes

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Which nonmetallic mineral is used as a building material and also in the manufacture of steel?

kvv77 [185]

Limestone.

It is a sedimentary rock composed of calcite and aragonite. It is used as a building material mainly because it is easily available and easy to work with.

Limestone is used in the manufacture of steel as it is the primary raw material that helps to remove impurities from the iron ore and produces waste matter that has low melting point and viscosity

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2 years ago

Which level of Ecology explores the relationships among different species and the environment?

vichka [17]

Answer:

I an expert in Biology, trust me.

I an expert in Biology, trust me.Your answer is Ecosystems.

Explanation:

An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life. Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts.

If you like my answer you can mark my answer as Brainliest.

And if you have any questions do not hesitate to ask.

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2 years ago

the data collected over the years clearly confirm depletion of ozone in the stratosphere. what do scientists still need to learn

Lisa [10]

Ozone is simply a molecule consisting of 3 oxygen atoms, which reacts strongly with other molecules. Ozone is created in the stratosphere when high energy uv radiation causes on O2 molecule to split. The free oxygen atoms collide and react with other O2 molecules to form O3.

Production is highest where the solar uv is the greatest eg near the tropics, but once created, the ozone is then circulated towards the poles by the atmosphere. The amount of ozone in the stratosphere can vary with location, season and even day to day climatic conditions.

The process of ozone creation is what makes the O3 in the atmosphere very effective at shielding the Earth from harmful uv radiation, which can cause many biological problems, such as skin cancer. However, due to its high reactivity, the uv found in the tropospher at ground level can aslo be dangerous as a toxic pollutant which is harmful to plants and lung tissue, and is a major cause of smog.

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horsena [70]

Answer:

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Explanation:

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3 years ago

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How does social distancing address the density dependent aspect of this disease?

9966 [12]

Answer:

Because your not close enough to get the virus if you have a mask, but if you don’t wear a mask, social distance is irrelevant because the sneeze or cough travels more that 100 feet and then your caught with the virus.

Explanation:

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2 years ago