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-BARSIC- [3]
4 years ago
14

Why are defense systems needed in multicellular organisms?

Biology
1 answer:
wolverine [178]4 years ago
8 0
We share an environment with many harmful organisms, so we need a way to protect ourselves
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What ecological level consists of all the ecosystems found on earth?
Wittaler [7]

Answer:

Levels of organization in ecology include the population, community, ecosystem, and biosphere. An ecosystem is all the living things in an area interacting with all of the abiotic parts of the environment.

Explanation:

Hope this helps! :)

5 0
3 years ago
What are some negative effects humans have on wetlands?
saw5 [17]
Wetlands are often drained in many regions to facilitate human use of the land. This happens a lot within the Pairie Provinces of Canada, where wetlands are drained to make way for agriculture. Wetlands are also often drained so as to use the land for building houses. Humans have also altered the flow of rivers through constructing dams and over-abstracting water. In many regions, depressions that would have been flooded in the past to form wetlands are no longer saturated. Wetlands also act as a 'sink' for many pollutants, and much of the pollution released into upstream rivers by humans may settle into the relatively stagnant waters of wetlands, to be absorbed into the sediments, where often it acts as a chronic pollutant, negatively effecting the aquatic ecosystem and water quality downstream. 
4 0
3 years ago
A science student makes the following statement.Based on the data, we determined that plant growth is affected by the type of so
gogolik [260]

Answer:

the conclusion

Explanation:

You could find the answer using the steps of scientific experiment

the steps are:  

Get purpose.

build up a hypothesis.

Test the hypothesis and collect data.

Analyze the data.

Draw conclusion.

Communicate results with others

In this case we could see that a student is trying to determine if  plant's growth are affected by the type of soil we use, by seeing the steps of the scientific method, we could say that this is the last step of the experiment. So, it is considered as the conclusion.

3 0
4 years ago
The genomes of three species of mouse are being sequenced, and a particular DNA sequence found in all three species is found to
antiseptic1488 [7]
Based on the principle of phylogenic tree building principle. the right answer is:
C) <span>The genomes of three species of mouse are being sequenced, and a particular DNA sequence found in all three species is found to have a steady mutation rate. The sequence of interest for these three species is shown below. 

A and C has only 5 differences.
A and B has 7 differences.  
B and C has 9 differences.
</span>
5 0
3 years ago
Early chest discomfort occurs in what percentage of patients with heart attacks?
Evgen [1.6K]
The early signs of a heart attack occur in 50% of patients that have a heart attack according to the Society of Cardiovascular Patient Care. If the early symptoms are noticed the treatment can be administered to prevent damage to the heart as the most heart damages, 85% occur in the 2 hours following the attack. 
8 0
4 years ago
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