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Monica [59]
2 years ago
13

-what new inventions made possible for scientists to practice direct observation?

Biology
1 answer:
Cloud [144]2 years ago
8 0
Microscope is one of the invention for scientist to practice direct observation. It allows scientists to observe the world in micro scale.
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Why is it ineffective to treat viral disease with antibiotics? Why is it ineffective to treat viral disease with antibiotics? Pa
Eddi Din [679]

Answer:

Antibiotics inhibit enzymes specific to bacteria and have no effect on virally encoded enzymes

Explanation:

The specificity of the antibiotics to inhibits some  bacterial enzymes is one of the major reasons why antibiotic do not affect viruses.In addition  antibiotics are designed to  have a significant  destructive  effects on  the mechanisms of biochemical reactions in bacteria and its  physiology, e,g on the cells walls,( inhibiting the formation of peptydoglycans) on certain organelles e,g ribisomes (inhibiting protein synthesis) and on the DNA(disrupting replication). The virus physiology is different from bacteria, therefore the design of antibiotics will nor affect these same mechanisms in viruses, thus no specificity for the antibiotic to act on in virus

4 0
2 years ago
Read 2 more answers
The Precambrian eon is separated from the Phanerozoic eon in the fossil record because of
Usimov [2.4K]

The Precambrian eon is separated from the Phanerozoic eon in the fossil record because of the sudden appearance of organisms.

Explanation:

Precambrian eon is the initial existence on earth that can be predicted by the study of rocks and remaining of fossils. It has been seen as the existence of skeleton in this era, before this era no such things has been observed, even the development of sexual reproduction.

The Phanerozoic era comes after the Precambrian era, more advanced kinds of fossils of animals had been observed in this era.  Phanerozoic era period of life on earth. Large organisms sudden appearance are seen in the Phanerozoic era i.e. First dinosaurs, mammals, fishes, angiosperms,first vertebrates etc.

5 0
2 years ago
How does natural selection or human evolution affect disease susceptbility
devlian [24]
<span>Investigations of the legacy of natural selection in the human genome have proved particularly informative, pinpointing functionally important regions that have participated in our genetic adaptation to the environment. Furthermore, genetic dissection of the intensity and type of selection acting on human genes can be used to predict involvement in different forms and severities of human diseases.</span>
4 0
3 years ago
Which system delivers oxygen and nutrients to all the cells of your body?
artcher [175]

Answer:

circulatory system

6 0
2 years ago
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What does this graph demonstrate?
gavmur [86]

Answer:

D. The achievement gap

Explanation:

Just took it

6 0
2 years ago
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