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Hoochie [10]
4 years ago
7

Until the early _______ there were only negligible amounts of free oxygen in the atmosphere.

Biology
2 answers:
ra1l [238]4 years ago
7 0
C Proterozoic is the answer I just took the test hope this is very help 
DerKrebs [107]4 years ago
5 0
Just took the test it's D. proterozoic
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For about reaction C4H10 plus 02 yields C02 plus H20 match the proper coefficient to the chemical substance it goes way for a ba
marusya05 [52]
The balanced reaction would be:

2 C4H10 + 13 O2 ----> 8 CO2 + 10 H2O

Like this both side of the reaction would have:
8 atoms of C
20 atoms of H
26 atoms of O
5 0
3 years ago
A male bird with the genotype GGBb is crossed with a female bird with the genotype Ggbb. What trait will most likely be observed
Julli [10]

Answer:

Dominant G will show always and dominant B will show 2 times in a 4 square punnet square

Explanation:

By making a punnet square/grid you can make a type of probability calculator for traits

6 0
3 years ago
Pls help me!!
klio [65]

Answer:

In explanation.

Explanation:

What is a punnett square used for?

It is a way to store data and keep track of things. It helps to predict the variations and probabilities that can come from cross breeding.

What do the probabilities of the possible offspring all add up to?

All can have 100%, 75%, 50%, or 25% depending on the specific trait.

4 0
2 years ago
What eats other organisms or make their own food?<br><br> Bacteria<br> Plants<br> Organisms
vodka [1.7K]

Answer:

plants make their own food with photosynthesis

Carnivore and Omnivore organisms eat other organisms

Explanation:

I tried to explain as best as I could I dont see your direct question I hope I helped

7 0
3 years ago
The vector, which is often a small, circular piece of dna that can exist outside the bacterial chromosome, is known as what?.
kramer

The vector, which is often a small, circular piece of dna that can exist outside the bacterial chromosome, is known as a plasmid.

Bacteria and certain other microscopic species contain plasmids, which are tiny circular DNA molecules. Physically distinct from chromosomal DNA, plasmids multiply on their own. They normally contain only a few genes, including some linked to antibiotic resistance, and they can spread from one cell to another.

Recombinant DNA techniques are used by scientists to splice the genes they want to research into a plasmid. The inserted gene is duplicated along with the plasmid when it duplicates itself. Molecular cloning, the process of creating DNA molecules and introducing them into a host cell, uses plasmid vectors as the means of delivering recombinant DNA into the host cell.

To know more about plasmids, refer to the following link:

brainly.com/question/7826558

#SPJ4

3 0
1 year ago
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