Answer:
The correct answer is option B, that is, promoter, operator, gene.
Explanation:
In a prokaryote, just in front of the operator, the promoter is located, and just in front of the structural genes, the operator is located. All these in combination give rise to an operon.
Any gene, which codes for an enzyme or a structural protein is termed as a structural gene, in the lac operon, a structural gene codes for three distinct kinds of enzymes. A short sequence of DNA is situated just in front of the structural gene, which is known as the operator. An operator functions as a switch for transcription, that is, it monitors whether the process of transcription will take place or not.
Just in front of an operator, a sequence of a promoter is present, and for the transcription and translation of all the structural genes, the RNA polymerase needs to combine first with the promoter. In case, if no transcription is to take place, then the operator allows the repressor to bind with it and prevent the attachment of RNA polymerase with the promoter. Hence, the correct sequence of a prokaryotic operon is a promoter, operator, and gene.
Answer: C. A brood chamber is made by bees, but comb foundations are built by humans.
Explanation:
The brood chamber is a natural part of the beehive where the bee workers made cells where these works lay eggs. Here, development of the larvae and pupae takes place. The cells of the brood chamber holds the pollen, nectar and honey which is used to feed to develop the larvae.
Comb foundations are the artificial creation made by humans is a place made from wax which forms the base of the honeycomb. It is used to give the support to the beehive.
At School level Answer is {C}
But Recent Research showed that Hemoglobin is present in Plants in different form
The energy transformations that occur in the given devices are as follows:
- Windmill - mechanical energy to electrical energy
- Flashlight - electrical energy to light energy
- Microwave - electrical energy to heat energy
- Firecracker - chemical energy to heat, light, and sound energy
- Bicycle - Chemical energy to mechanical energy
- Battery - chemical energy to electrical energy
<h3>What is energy transformation?</h3>
Energy transformation refers to the processes by which one form of energy is transformed into another form.
The law of conservation of energy guides the various energy transformations that occur in the universe.
The law of conservation of energy states that energy is neither created nor destroyed but can be transformed from one form to another.
The energy transformations that occur in the given device are as follows:
- Windmill - mechanical energy to electrical energy
- Flashlight - electrical energy to light energy
- Microwave - electrical energy to heat energy
- Firecracker - chemical energy to heat, light, and sound energy
- Bicycle - Chemical energy to mechanical energy
- Battery - chemical energy to electrical energy
In conclusion, energy transformations occur according to the law of conservation of energy.
Learn more about energy transformations at: brainly.com/question/382594
#SPJ1
The amount of greenhouse effect on Earth is directly proportional to the concentration of greenhouse gases in the atmosphere. In this era of industrialization, although it may seem that it has greatly improved the global economy, it also downplays the importance of consistently upholding our role as a steward to Earth.
The most common types of human activities that continuously worsen the greenhouse effect are: burning of fossil fuels, agriculture, and industrial processes.
The burning of fossil fuels such as coal, oil, and gas emits carbon dioxide which accounts for approximately three-quarters of the warming impact caused by the greenhouse gas emissions. This is amplified significantly through deforestation.
Methane, which accounts for 14 percent, and nitrous oxide, which accounts for eight percent are one of the major greenhouse gas emissions on earth. This can be sourced out from livestock and rice fields and also fossil fuel extraction and organic waste decay in landfill sites.
Industrial processes would incept fluorinated gases which accounts for one percent of the warming effect of current human greenhouse gas emissions.
Although it may seem that the values are not that high, but it must also be taken into consideration the several or a superfluous number of industries all around the world that simultaneously worsens the already groveling site of the continuously deteriorating and exploited planet Earth.
