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stich3 [128]
3 years ago
9

This leaf is 4 inches long.” What kind of observation is this?

Biology
2 answers:
MatroZZZ [7]3 years ago
7 0

Answer:

This observation would be quantitative.

Explanation:

This is quantitive because it says how many of what there is.

Nezavi [6.7K]3 years ago
6 0

Answer:

Explanation:

The statement “This leaf is 4 inches long.” is an example of a quantitative observation. These observations are made with instruments like balances, rulers, thermometers and the like. Hope this answers the question.

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Please help ASAP! Describe at least one way in which each of Earth’s subsystems was altered during the Precambrian era.
trasher [3.6K]

The Precambrian era envelopes the major bulk of the history of the Earth, beginning from the creation of the planet approx 4.5 billion years ago and terminating with the origination of composite, multicelled forms of life approximately 4 billion years after.

The Precambrian refers to the earliest of the geologic ages that are signified by the distinct layers of sedimentary rock. The Earth was about more than six hundred million years old when life started. The planet had cooled down from its native molten state, creating a solid crust and oceans formed by water vapor in the atmosphere.

At about three billion years ago, the atmosphere of the Earth was virtually devoid of oxygen. At approximately 2.4 billion years ago, oxygen was discharged from the seas as a waste product of photosynthesis by cyanobacteria. The levels of the gas slowly raised, attaining about 1 percent around two billion years ago.

Approximately 800 million years ago, the levels of oxygen attained about 21 percent and started to breathe life into more composite species. The oxygen-rich ozone layer was also created, protecting the surface of the Earth from the harmful solar radiation.


8 0
3 years ago
Read 2 more answers
The reproductive system in both males and females are controlled and regulated by the interaction of hormones from the hypothala
sweet-ann [11.9K]

The reproductive system in both males and females are controlled and regulated by the interaction of hormones from the hypothalamus and pituitary glands with hormones from the reproductive organs. How do these hormones affect the development of male and female reproductive systems

4 0
2 years ago
To maintain asepsis when administering an injection, all parts of the syringe can be handled except the:
cricket20 [7]

Answer:

needle

Explanation:

Asepsis refers to the absence of bacteria, viruses, and other microorganisms. When handling a syringe the user can handle all parts of the syringe except for the needle. As soon as the needle comes into contact with anything it can immediately come into contact with bacteria, viruses, and other microorganisms. Which can cause an infection in the individual on which the syringe is being used on.

8 0
3 years ago
A new moon occurs once every 29.5 days. Why must the Sun, Earth, and the Moon be aligned in order for the new moon to occur
Vsevolod [243]

Answer:

The sun, Earth and the moon are aligned, but because the moon's orbit is not exactly in the same plane as Earth's orbit around the sun, they rarely form a perfect line. When they do, we have a lunar eclipse as Earth's shadow crosses the moon's face.

Explanation:

4 0
3 years ago
Select the best description of amino acid metabolism: Group of answer choices Amino acid metabolism does not occur. Aerobic meta
Stolb23 [73]

Answer:

Aerobic metabolism of amino acid requires deamination

Explanation:

Living system can be defined as the internal systems of organisms and how materials circulate within organisms.

Generally, these living systems are self-organized life forms and are known to be very much interactive with their surroundings or environment. Also, living systems are dependent on the flow of information, matter and energy at various levels.

Some examples of living systems in organisms are respiratory system, nervous system, digestive system, and circulatory system.

Additionally, living systems comprises of the following components; cells, organs, muscle, tissues, blood, etc., which are typically used for carrying out various bodily functions such as respiration, digestion, metabolism, etc.

Metabolism can be defined as a set of chemical processes carried out by a living organism such as humans, plants and animals, in order to sustain life.

Aerobic (oxygen-using) metabolism can be defined as a biological process that typically involves the extraction of energy from any carbohydrate source such as amino acids, fatty acids, etc.

Basically, an aerobic metabolism of amino acid is a process that requires deamination.

Generally, proteins comprises of amino acids and it is responsible for maintaining the proper functioning of the body system.

Transamination can be defined as a biochemical process which typically involves the removal of amino groups from amino acids and transferring them to a ketoacid (amino acid without an amine group), so as to form new amino acids.

Basically, transamination is a reversible oxidation-reduction reaction that is responsible for the deamination of amino acids.

4 0
2 years ago
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