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Ronch [10]
3 years ago
6

Can someone help me with these assignments because im having alot of trouble

Biology
1 answer:
Ksenya-84 [330]3 years ago
5 0

Answer:

where are the assignment. ?????????????????

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Chromosome 11 is made of over ( )million base
Natalka [10]

Answer:

Chromosome 11 is made of over

⇒ 130 million base pairs.

Approximately  ⇒ 2000 genes are found on chromosome 11

7 0
3 years ago
Why are data tables used in a controlled experiment?
amid [387]

Answer:

b to help organize data and record info.

3 0
3 years ago
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Help me please please
natita [175]

Answer:

1) A

2) Could be A, B,  or D

Explanation:

1)   Prokaryote is a single celled organism that has no distinct nucleus, membrane  - bound organelles, and specialized organelles (such as the mitochondria).

This definition would only match A) a bacteria cell because all the other cells are called Eukaryotas (which are more complex and have membrane - bound organelles).

2) The answer could be A because Prokaryotic cells lack membrane bound organelles

The answer could be B because the diagram has labeled the cell membrane as "plasma membrane"

The answer could NOT be C because Prokaryotic cells do not have nucleus's, but have free floating DNA.

The answer could be D because it is the only image that has a flagellum (which helps the cell move)

I am sorry I couldn't answer this question completely, but I think that this question has flaws.

Hope this helps! Let me know if you have any other questions!

6 0
3 years ago
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What is the difference between a community and a population?
ratelena [41]
I think the answer is B
8 0
3 years ago
Sea organisms rely on the deep oceanic currents for food and nourishment.
Paha777 [63]

Answer: Currents are powerful physical forces in the seas. They move water and heat around the globe, and help determine the chemical make-up of the water column. Currents also are a major factor in ocean ecosystems. Two types of current motion, upwelling and downwelling, strongly influence the distribution and abundance of marine life.

Upwelling

Currents play a huge role in marine productivity, through a process called upwelling. Sea life is concentrated in the sunlit waters near the surface, but most organic matter is far below, in deep waters and on the sea floor. When currents upwell, or flow up to the surface from beneath, they sweep vital nutrients back to where they're needed most.

Nowhere is the link between ocean circulation and productivity more evident than around Antarctica. There, strong currents pump nitrogen and phosphate up from the deep sea to fuel vast blooms of algae and other plants. These plankton are eaten by swarms of shrimp-like crustaceans called krill. Because of upwelling nutrients, krill are abundant enough to feed the largest animals on earth, baleen whales, as well as myriad penguins, seals, and seabirds. In fact, despite the harsh conditions, the biomass of Antarctic krill is thought to be greater than that of any other animal on Earth.

Downwelling

The importance of upwelling to surface organisms is matched by the need of sea bottom life for downwelling, or the sinking of surface water. Surface water can be forced downward by the pressure of the “pile” of water that forms where currents converge or wind drives the sea against a coastline. But for bottom dwellers, the sinking of water caused by density changes is especially noteworthy. The global conveyer belt takes oxygen-rich surface water and flushes it through the deep sea. Without this renewal, the dissolved oxygen in bottom sediments and waters would quickly be used up by the decay of organic matter. Anaerobic bacteria would take over decomposition, leading to a build up of hydrogen sulfide. Few benthic animals would survive such toxic conditions.

In the most extreme cases, a lack of downwelling may lead to mass extinctions. Paleontologists have suggested that 250 million years ago, deep circulation slowed nearly to a stop, and the ocean began to stagnate. Low oxygen, sulfide and methane-rich waters filled the ocean deeps and then spread onto the continental shelves, wiping out 95% of all marine species in the greatest extinction event in Earth history.

Explanation:

8 0
2 years ago
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