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SpyIntel [72]
1 year ago
8

Which variable should be changed in an experiment to test the best conditions for bacteria to grow? the type of bacteria used th

e length of time that the bacteria are left alone the size of the original colony of bacteria the material that the bacteria feed upon
Biology
1 answer:
Setler [38]1 year ago
7 0

An experiment to test the best conditions for bacteria to grow is the material that the bacteria feed upon. <u>Option D.</u>

<u />

Antibacterial hand soap with different concentrations. Dependent variable bacterial growth as measured by the diameter of the zone of inhibition. Exposing Petri dishes to different temperatures can skew the level of bacterial growth they inhabit. Plant height is the dependent variable that responds to changes in the independent variable.

Sunlight is the controlling variable because each plant is exposed to the same amount of sunlight. It is the dependent variable because it measures the amount of plant growth. The dependent variable depends on the independent variable. How much plants grow depends on how much sun they receive. A continuous increase in temperature from a minimum value increases the rate of bacterial growth because the rate of metabolic reactions increases with increasing temperature.

Learn more about An experiment here:- brainly.com/question/17274244

#SPJ1

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Which statements correct
sladkih [1.3K]
The correct answer is C. Here's why: 

Choice A is illogical. A single experiment does not confirm a theory as true. Multiple successful trials are needed for one to even consider a hypothesis to be accepted as a theory. 

Choice B is wrong. If a scientist finds a new way to test a hypothesis, experimental methods do change. Note that when there are additional ways to test a hypothesis, a scientist should test it with additional methods. 

Choice D is incorrect. If someone finds a way to test a new hypothesis, it would not be made into law since there is more information regarding the theory. This means that it would remain a theory until one can prove that it can't be tested using different methods.
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3 years ago
That ground glass lenses to very fine specifications so that he was able to develop a microscope for observing and describing li
blagie [28]

Answer:

Antonie van Leeuwenhoek

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Antonie van Leeuwenhoek was a Dutch linen merchant who specialized in grinding glass lenses to ever finer specifications. This grounded glass lenses built at an ever finer specifications was the groundwork for his manufacturing of the microscope that is used for studying and describing various living microscopic animalcules.

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Which statement best describes the similarities between insects and animals? (2 points)
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Answer:

1. c . The life cycles of insects and animals all start from a fertilized egg.

2. d . A bee goes through a pupa stage, while the grasshopper goes through a nymph stage.

3. b . I and II

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The egg fertilization is very important for the emergence of almost all organisms. If the egg is fertilized then it will change into an organism otherwise no organism is produced from that unfertilized egg.  The bees has four distinct life stages i.e. the egg, larva, pupa and adult whereas grasshopper has three stages i.e. egg, nymph, and adult. A moth and an eagle both start their life cycle as a fertilized egg and moth and an eagle both hatch from an egg which is laid by the mother outside of their body..

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