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Sauron [17]
3 years ago
7

Time on earth is divided into 6 eras. Three are considered "Precambrian" Which eras are NOT Precambrian?

Biology
1 answer:
bulgar [2K]3 years ago
8 0

Explanation:

<u>the  Paleozoic Era </u>

The Precambrian era describes a period of time that pre-dates Cambrian. This time typically references the entire period of the history of earth before the formation of rocks containing identifiable fossils occurred. It covers the majority of Earth’s history and is divided into the Hadean, Archean and the Proterozoic era.

Just before the Cambrian eruption, in the  Paleozoic Era the environment was oxygenated, culminating in an explosion of new life in the Proteozoic Eon (2500-541 million years ago) in the form of primitive blue-green algae named cyanobacteria and oxygen based species. Multicellular species followed later, along with structure at higher levels, and complex life. Oxygen levels grew gradually over this period of time, from low levels.

Learn more about cellular life at brainly.com/question/11259903

#LearnWithBrainly

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2. How will the alleles for these traits assort into the gametes that each parent might produce? (Hint: For a reminder on how al
Luden [163]

Hello!

We all are very well familiar with Mendel's laws of inheritance. Just recalling Mendel's  law of independent assortment that states, "alleles of different genes are inherited independently of one another".

Here we have two traits, and we want to know how the alleles of these traits will assort independently during the formation of gametes from two parents.

The two traits are:

  1. Flower color ( Can be purple or white)
  2. Seed shape   (Can be round or wrinkled)

Here the alleles of the traits are represented by alphabets as:

  1. purple flowers: P
  2. white flowers: p
  3. round seeds: R
  4. wrinkled seeds: r

We have parent one as PpRr  

The gamete formation of one trait (Pp) will be independent of the other trait (Rr) in Parent 1.

  • Gamete 1: PR  
  • Gamete 2: Pr  
  • Gamete 3: pR  
  • Gamete 4: pr  

We have parent two as PpRr  :

The gamete formation of one trait (Pp) will be independent of the other trait (Rr) in Parent 2 as well.

  • Gamete 1: PR  
  • Gamete 2: Pr  
  • Gamete 3: pR  
  • Gamete 4: pr

This shows that there is not restriction that the allele for wrinkled seed r will go with allele of white flower p because its recessive or allele of round seeds R will go with allele of purple flowers P because  its dominant. There is no restriction when alleles are assorting into gametes and they can go randomly as per nature's choice with any one.


Hope it helps! :)

5 0
3 years ago
explain the role of cellular respiration and decompostion in the carbon cycle. I NEED THE ANSWER QUICK BTW (dont plagiarize)
alina1380 [7]
The goal of cellular respiration is to produce carbon dioxide by using oxygen. The final product can be used later on for photosynthesis.

The second process requires carbon being put back into the process it used to be in, unlike when it was in any dead organism. Waste products are broken down through this never ending product. The main goal of decomposition through the carbon cycle is to free carbon through another process called cellular respiration.
3 0
3 years ago
Read 2 more answers
A biologist adds a vitamin solution, which acts as a co-factor, to an enzyme/substrate solution. What affect will this have on t
Contact [7]
I would go with It will increase the reactivity with the substrates. Because if there is no factors, the <span>rate of enzyme activity will increase.
</span>
Hoped I helped :)
3 0
3 years ago
Read 2 more answers
What process is used by prokaryotes to obtain some materials and remove waste?.
denis-greek [22]

Answer:

In order to obtain some materials and remove waste, what process is used by prokaryotes? Diffusion. The changes in the concentration help the movement of the particles and waste across the plasma membrane. This process is known as diffusion, where molecules move from high to low concentration.

Explanation:

6 0
2 years ago
Answer numbers 1 to 8.
garik1379 [7]

Answer:

South Africa

Explanation:

Water

6 0
3 years ago
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