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butalik [34]
3 years ago
8

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

Biology
2 answers:
ad-work [718]3 years ago
6 0
Am certain that the factor that prevents us from finding fossils from the Precambian era is that Most rocks from that era are deeply buried.  The precambrian is the informal name for the large expanse of time preceding the current Phanerozoic Eon. It began with the Earh's Formation about 4.5 billion years ago and lasted until the advent of multicellular life about 542 million years ago.
Harman [31]3 years ago
3 0

Answer: Life forms in this era had no skeletons

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¿Cuál célula es capaz de sobrevivir en
jeka57 [31]

Answer:

E.) Arqueobacterias​

Explanation:

3 0
2 years ago
Mary has type A blood and her husband (John) has type B blood. John's parents both had type AB. Mary and John have three childre
pav-90 [236]
Since Mary has a Type A blood, she is either AA or AO while John is either BB or BO. Since both John's parents are Type AB, he can only have the either A or B as an allele and not O so he is BB. Since John can only give the B allele, all of his children must have the B allele in their blood types. So the adopted one is the child with type A blood.
8 0
2 years ago
In august 2010, the asian clam was discovered in lake george. it is not native to that area. a single clam can reproduce and rel
vekshin1
The introduction of the Asian Clam in Lake George is an example of an Invasive Species.

Asian Clam are small in size, hardly 1.5 inches long. However, they can reproduce very quickly without the need for a partner. A single clam can give birth to hundreds of offspring in a single day without a mate.

Asian Clam is extremely unpleasant for most fresh water bodies since it excretes nutrients such as nitrogen.

This helps in the development of algae and gives off a foul stink.
8 0
3 years ago
Read this Pulmonology Consult excerpt:On physical exam, the patient is alert. He takes occasional pauses when he says long sente
Alborosie

Answer:

B. "Whispered pectoriloquy" - "speaking from the chest"; used as a means of finding masses in the lung. The whispered word is audible in areas where fluid or a mass is present

Explanation:

Auscultation in medicine, is the action of listening to sounds from the heart, lungs, or other organs, usually using a stethoscope, in order to perform medical diagnosis.

Auscultation is performed for the purposes of examining the circulatory and respiratory systems, as well as the alimentary canal. The procedure is best performed in a quiet examination room. A stethoscope is used to magnify internal sounds. Small changes in breath sounds are carefully observed in order to make a diagnosis.

Whispered pectoriloquy is used to detect vocal resonance. It is  used as a means of finding masses (consolidations e.g. pus) in the lung and is performed by having the patient quietly whisper a word. If fluid or a mass is present, words that are whispered may be heard clearly.

7 0
3 years ago
What is Transcription, Translation, IN YOUR OWN WORDS
kicyunya [14]

Answer:

Transcription is the process of making an RNA copy of a gene sequence. This copy, called a messenger RNA (mRNA) molecule, leaves the cell nucleus and enters the cytoplasm, where it directs the synthesis of the protein, which it encodes.

Explanation:

3 0
2 years ago
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