BIOLOGY MIDDLE SCHOOL

Which photosystem is used first in photosynthesis

Answers

Answer 1
Answer:

Photosystem II is used first during photosynthesis.

I hope I helped!
Answer 2
Answer:

Photosystem II was used first in photosynthesis.

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How many organisms represented are multicellular?

Answers

All of the organisms are multi-cellular. 
Fungus, belonging to the fungi kingdom,
Green plant, belonging to the plant kingdom,
Spider and Birds, belonging to the animal kingdom.
All of the above kingdoms are made up of only multi-cellular organisums, excluding some yeasts in the fungi kingdom.
Good luck!

Why's it possible for many different species to live together in one ecosystem?

Answers

They each adapt to eachother

Answer:

 Individual organisms live together in an ecosystem and depend on one another.  In fact, they have many different types of interactions with each other, and many of these interactions are critical for their survival.

Why bacteria in the soil. are necessary in this ecosystem 8th Grade Science

Answers

There could be a lot of reasons. To help break down food for the plants, kill off bad and harmful things that might damage the plant. 
Bacteria are important in the soil to maintain the nitrogen cycle. Certain type of bacterais help in nitrogen fixation. They also decompose dead and decaying matter into nitrogen compounds such as ammonia. The nitrogen and nitrogenous compounds in turm help the plant to grow.

When the plant dies, the bacteria again decomposes it into nitrogenous compounds. Not only plants, but also animals. The nitrogen then passes through various stages and then gets back to atmospheric nitrogen. Bacteria is an important part of this nitrogen cycle. 

Help quick!!!!!!!!!!!

Answers

It would be Ptolemy

Aristarchus of Samos is his name.


Hope this helps.

steel that is exposed to water and salt rusts quickly. if you were a shipbuilder, how would you protect a new ship? explain your answer.

Answers

I would coat the boat in FlexSeal. 

What do B cells produce?

Answers

Answer:

Each B cell produces a single species of antibody, each with a unique antigen-binding site

Explanation:

Answer:

B cells produce antibodies

Explanation:

Each B cell produces a different type of antibody

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