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olga_2 [115]
2 years ago
7

Please someone help me with this

Biology
1 answer:
fiasKO [112]2 years ago
8 0

Answer:

Explanation:

1. a. Sunlight hitting the Earth's surface is the source of all energy in the pyramid.

b. 25,500 kcal is provided by this source to a square meter per year.

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<span>The reactivity of the elements depends on the number of electrons in the outermost shell and the distance of outermost shell depends on the influence of the nucleus.........</span>


3 0
3 years ago
Species are normally subdivided into populations that are more or less scattered, that may be separated at one time, but may mer
Anastasy [175]

Answer:

Reticulation

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Reticulation is a process which explains the origin of many organisms formed by the merging of the two lineages. The species are formed when the species in the evolutionary process got scattered, formed two lineages and then again reproduced and merged.

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6 0
3 years ago
A nerve is a bundle of axons, and some nerves are less sensitive to lidocaine. If a nerve, rather than an axon, had been used in
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Answer:

the response at R2 after lidocaine application will not be zero

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The response at R2 after lidocaine would not be zero because it is recording the of all action potentials and some axons may be unaffected.

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3 years ago
--- is a technique that allows the dna fragments to separate accurate according to length
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4 0
3 years ago
Biotic or abiotic factor
Stels [109]

6. Algae are biotic factors. They are living organisms which have the capability to produce food through photosynthesis. It acts as a producer. Also they appear on the wall of tank  through reproduction , which is characteristics of living being.

7. Snail is also a biotic factor like algae. They are classified as consumers. They feed on algae to survive with in the tank. They move while feeding on algae and movement is an important trait of living being.  

8. Light Bulb is an abiotic factor. Though it is an essential requirement for fish to survive but since it is not a living being , it is considered as abiotic. While fish  on the other hand is a biotic factor as it possess life in it.  

7 0
3 years ago
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