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musickatia [10]
4 years ago
13

How do the atmospheric conditions near the beginning of Precambrian time contrast with the atmospheeic conditions that are prese

nt now? Which organism is largely responsible for this change?
Biology
2 answers:
Art [367]4 years ago
7 0
Early pre-cambrian period the atmosphere consisted only of nitrogen and carbon dioxide without oxygen.

<span>A Prokaryotic cell does not contain a nucleus. It only contains one chromosome and is a single-celled organism. It was the only form of life on earth for millions of years. Examples of a Prokaryotic cell are the different types of bacteria present today.

</span><span>Autotrophs obtain energy by the process of photosynthesis. Any living organism need energy to survive and autotrophs are no different. Two types of autotrophs are present and they are Photoautotrophs and Chemoautotrophs. The Photoautotrophs rely on the energy produced during the process of photosynthesis and the Chemoautotrophs get their energy from most of the inorganic substances. Phtoautotrophs actually get their energy from the sunlight and then convert it into reusable form. In case of Chemoautotrophs ammonia is an important source of energy for them.</span>


Darya [45]4 years ago
5 0

Answer:

The atmosphere has a much greater percentage of oxygen now that it did before. Cyanobacteria is the organism that is largely responsible for this change.

Explanation:

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Question 1
Akimi4 [234]
Animal because the algae and plant would have to have chloroplast and the bacterium does not have a nucleus as it is a prokaryote.
8 0
3 years ago
Two species of frogs belonging to the same genus occasionally mate, but the embryos stop developing after a day and then die. th
allsm [11]
These two frog species separate by reduced hybrid viability. In reduced hybrid viability gene of different parent species may interact and impair the hybrid's development while in a reduced hybrid fertility a viable individual is sterile often due to the inability to produce normal gametes in meiosis. Hybrid breakdown; the first generation are viable and fertile, but when they mate the offspring are feeble and sterile.
7 0
3 years ago
g "A protein is made from a messenger RNA of the following sequence. What is the sequence of amino acids for this protein? (Reme
KiRa [710]

Answer:

The correct answer is (amino) met - lys – phe

Explanation:

3' G C C G A U G G A U G A A G U U U U A A A G U A A U A G C A A U G G A G G A C 5'

Write the mRNA in opposite or reverse order as 5' to 3' and then start with AUG  codon.

Write the mRNA in revers order as 5’ to 3’ and starts with AUG codon.

5’-CAGGAGGUAACGAUAAUGAAAUUUUGAAGUAGGUAGCCG -3’

mRNA—5’AUG-AAA-UUU-UGA-AGUAGGUAGCCG -3’      

Peptide: (amino) Met-Lys-Phe-STOP

4 0
3 years ago
3 ways humans have cut and frayed the woven tapestry of earths biodiversity
WITCHER [35]

Three ways that humans have cut and frayed the woven tapestry of earths biodiversity:

1.       Landscaping. By landscaping, living things such as trees are eliminated to make way for the construction of buildings. And thus, disrupting the ecosystem.

2.       Adding cement to the ocean to increase the land surface area by excavating soil from the maintains.

3.       Cutting of trees.

8 0
3 years ago
What is the definition to 'light'?​
Olenka [21]

Answer:

Light is electromagnetic radiation within a certain portion of the electromagnetic spectrum. The word usually refers to visible light, which is the visible spectrum that is visible to the human eye and is responsible for the sense of sight.

3 0
4 years ago
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