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3 years ago

What factor prevents us from finding fossils from the Precambrian era?

Biology

2 answers:

kolezko [41]3 years ago

6 0

Answer:

rhe answer is that the rocks of that time are buried deeply under the soil.

Fed [463]3 years ago

3 0

<h3>What factor prevents us from finding fossils from the Precambrian era?</h3>

A. Life-forms in this era had no skeletons.

B. This was before life existed on Earth.

<h3><u>C. Life was destroyed by a series of mass extinctions.</u></h3>

D. There are no rocks left from that era.

<h2>#CarryOnLearning</h2><h2>#LearningIsFun</h2>

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Alcohol dehydrogenase (ADH) is an enzyme that aids in the decomposition of ethyl alcohol (CH3OH) into nontoxic substances. Methy

KonstantinChe [14]

Answer:

D.Competitive inhibition will decrease because the proportion of the active sites occupied by substrate will increase.

Explanation:

Methyl alcohol is a competitive inhibitor of ethyl alcohol. This means that both of them compete with each other for the same enzyme (ADH). Methyl alcohol leads to poisoning because it is converted to toxic formaldehyde in body. It can be treated by increasing the concentration of ethyl alcohol.

More ethyl alcohol (substrate) will reduce the competitive inhibition by methyl alcohol (inhibitor). This will happen because a substrate needs active sites on an enzyme to attach to it. If ethyl alcohol is increased in concentration, it will occupy more active sites and their availability to methyl alcohol will be reduced. Thus, the enzyme will not be able to act on methyl alcohol.

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3 years ago

The genome of modern chloroplasts is roughly 50% the size of the genome of the cyanobacterium from which it is thought to have b

Luda [366]

<h2>Endosymbiosis</h2>

Explanation:

The endosymbiotic incorporation of a cyanobacterium into a eukaryotic host cell offered to ascend to the basic progenitor of the Archaeplastida that along these lines split into the three essential plastid genealogies, Glaucophyta, Viridiplantae, and Rhodophyta
Endosymbionts and their hosts frequently speak to the distinct domains of life. As an outcome, their amalgamation can create totally new blends of biochemical capacities and permit the two, interweaved species to flourish in conditions that would be aloof to either alone
The examination of the total chromatographic genome sequence of P. chromatophore strain CCAC 0185 uncovered a principal genome decrease. The single, round chromosome of 1.02 Mb encodes just 867 protein-coding genes and is, therewith, the littlest cyanobacterial genome reported to date
In spite of the fact that the chromatophore genome contains a practically complete arrangement of photosynthesis genes, it needs not just genes thought to be nonessential for an intracellular way of life yet additionally genes of fundamental pathways for amino corrosive and cofactor biosynthesis
Hence, the right answer is "P. Chromatophore is a result of evolutionarily recent endosymbiosis"

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4 years ago

What term is used to describe how well an organism functions in its<br>environment?

brilliants [131]

Answer:

Fitness

Explanation:

I got it correct

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Over the past 60 years, the level of carbon dioxide in the atmosphere has been continually increasing. Many scientists hypothesi

padilas [110]

A is the awnser i hope

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Ber [7]

Explanation:

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