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Elodia [21]
2 years ago
11

When did oxygen begin to accumulate in the atmosphere

Biology
2 answers:
maxonik [38]2 years ago
8 0
2.4 billion years ago the oxygen concentration in earth’s atmosphere increased suddenly from trace amounts to appreciable quantities
oee [108]2 years ago
4 0

Answer:

2.33 billion years ago.

Explanation:

Hope this helps <3

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The nurse is caring for a client with aphasia. which strategy will the nurse use to facilitate communication with the client?
mina [271]
Establish eye contact 

The following strategies should be used by the nurse to encourage communication with a patient with aphasia:

face the patient and establish eye contact,

speak in your usual manner and tone,

use short phrases,

pause between phrases to allow the patient time to understand what is being said
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3 years ago
The traits of an organism are largely determined by the traits of its parents. What do parents pass on to their offspring?
Semmy [17]
Their phenotypes because it just is I learned about it recently
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3 years ago
For a project I needed to ask 25 people : do you think eating meat is bad for the environment?
Lelu [443]

Answer:

Yes (It's more inefficient)

Explanation:

in ecology there are things called primary producers (plants) that are eaten by primary consumers (cows and chickens) and then there are humans, secondary consumers, that eat cows and chickens for energy.

The further we move from eating primary producers the more inefficient we become in consuming energy. Meaning, it requires a lot more natural energy consumption to support a human that lives on meat only as compared to a human that eats plants only. this inefficiency only magnifies when communities practice unsustainable food methods.

There are sustainable ways to eat meat, but (at least in the US) our current conventions of meat production are unsustainable and environmentally destructive.

5 0
3 years ago
Describe the base-pairing rules in any DNA molecule
In-s [12.5K]
The selective pairing of adenine (A) with thymine (T) and guanine (G) with cytosine (C) is based on the number of hydrogen bonds established between one of the purine bases and the one pyrimidine bases
6 0
3 years ago
Which DNA fingering technique examines the length variation of DNA repeat sequences in human DNA?
DiKsa [7]

Answer: The question is incorrect, below is the correct question

Which DNA FINGERPRINTING technique examines the length variation of DNA repeat sequences in human DNA?

The correct answer to the question is option D

mtDNA (mitochondrial DNA) analysis

Explanation: DNA fingerprinting technique is a laboratory technique used by geneticists.it entails placing of DNA samples into wells,these wells are then placed in a slab of gels and thereafter passing a current through the gel.This is done to ascertain the uniqueness of a DNA pattern and thus be able to differentiate people of same species.

There are several methods of DNA fingerprinting as outlined in the options given with the question.

In mtDNA (mitochondrial DNA) analysis,The Genetic samples are extracted from the biological materials, these samples extracted are total genomic DNA like hair,tooth or samples of blood, Several copies of these genomic DNA are then produced using a polymerase chain reaction and flanking primers inorder to examines the length variation of DNA repeat sequences in human DNA.

5 0
3 years ago
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