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Leni [432]
3 years ago
8

Pleaseee answer ASAP 15 points if answer

Biology
1 answer:
Fittoniya [83]3 years ago
5 0
In a nutshell, a chemical change produces a new substance, while a physical change does not. A material may change shapes or forms while undergoing a physical change, but no chemical reactions occur and no new compounds are produced. And for an explanation on how to see the difference Look for an indication that a chemical change occurred. Chemical reactions release or absorb heat or other energy or may produce a gas, odor, color or sound. If you don't see any of these indications, a physical change likely occurred. Be aware a physical change may produce a dramatic change in the appearance of a substance. This doesn't mean a chemical reaction occurred.
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Explain how goal of today’s classification system differs from earlier systems
gladu [14]

Classification systems previously were having very different goals than modern classification systems. If we look at old eras, scientists like Aristotle  and Theophrastus  tried to classify organisms on the basis of apparent characteristics, habitat and simple other traits.

Old classification systems had alot of errors and flaws. For example they classified fish and whale in one group because they lived in water, now we know fish is amphibian while whale is mammal.

So we can say that the goal o earlier classification system were just to make groups of organisms on the basis of External features.

Goal of modern classification system:

Modern classification approach was started by Linnaeus. It focuses more on biological delimitation and evolutionary histories than mere external characteristics. It organizes organisms in groups in such a way that grouping reflects their evolutionary relatedness. It is not just specie level but also focuses on sub-specie and population level classification.


Thus modern goal is better in many terms and is more reliable than old classification goals.


Hope it helps!

3 0
3 years ago
_____ is a mixture of dead organic material that can be used as fertilizer. (
Ilya [14]

Answer: compost

Explanation:

i looked it up and i'm pretty sure it's compost

8 0
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How do trees control noise pollution?
klio [65]

Answer:

A properly designed buffer of trees and shrubs can reduce noise by about five to ten decibels — or about 50 percent as perceived by the human ear, according to the USDA National Agroforestry Center

Explanation:

6 0
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One of the products of the Kreb's cycle is
nevsk [136]
Answer: Carbon dioxide

Krebs cycle, also known as the citric acid cycle or TCA, uses 1 glucose molecule to produce 2 acetyl Co-A molecules which in turn are broken down to release:

1) 4 CO2
2)2FADH2
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Which scientist demonstrated that the green parts of plants absorb carbon dioxide and release
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Jan Ingenhousz discovered photosynthesis

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