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eduard
3 years ago
11

A typical ecosystem like the one pictured here might have 200,000 caterpillars, 10,000 frogs, 500 snakes, and 35 owls. Why do yo

u think there are fewer and fewer organisms at each level of the food chain?
Biology
1 answer:
dimulka [17.4K]3 years ago
6 0
Because the lower levels of the food chain have the most energy so more organisms can be sustained, but as you go up the food chain, less and less energy is transferred so less organisms can survive
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Short segments of newly synthesized DNA are joined into a continuous strand by _____.Short segments of newly synthesized DNA are
Sloan [31]

Answer:

a. Ligase

b. Ligase ( it's repeated)

Explanation:

DNA synthesis begins, therefore, by synthesizing a short segment of RNA called a primer, which primer is synthesized by an enzyme called Primasa. Primasa is an RNA polymerase that uses DNA as a template. All fragments of Okazaki begin with a Primer. Subsequently, the DNA polymerase III Holoenzyme performs the synthesis of the corresponding DNA fragment until it reaches the next primer. At that time, DNA polymerase Ia replaces the DNA polymerase Holoenzyme III. The DNA polymerase I is responsible for removing the RNA primer through its 5'P-3'OH exonueotic activity and at the same time fills the hole by synthesizing DNA.

Finally, the two Okazaki fragments have to be joined, it is necessary to link the 3'OH end of a fragment with the 5'P of the next fragment. This work of sealing and joining the successive fragments is done by Ligase.

4 0
3 years ago
Which process keeps the Earth from having extremely cold temperatures at night? *
Afina-wow [57]

Answer:all of them

Explanation:

7 0
3 years ago
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Catfish have dorsal fin spines, which help defend against predators, and caudal fins, which help to propel the fish through the
Yuliya22 [10]

Answer:

Swim bladder

Explanation:

Swim bladder is an organ in bony fishes such as catfish that controls their buoyancy. It is also known as air bladder. The swim bladder contains  gas, mainly oxygen and functions as a hydrostatic organ.

As the fish moves in deeper water, the gas in the swim bladder is contracted which decreases the volume of swim bladder.

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3 years ago
Please rewrite in own words. PLEASE HELP VERY DESPERATE!!!!!!!!!!!!!!!
butalik [34]
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Among human populations the most fresh water is used for
iVinArrow [24]
Drinking and cooking is the correct answer 
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3 years ago
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