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melamori03 [73]
3 years ago
14

A person who has been exposed to a disease and is capable of transmitting the disease is a:

Biology
1 answer:
Amiraneli [1.4K]3 years ago
7 0
Communicable disease 
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58:57 What would most likely happen to life on Earth if the carbon cycle stopped? Life would continue unchanged. Life would ceas
Naddik [55]

Answer: Life would cease to exist.

Explanation:

The carbon elements is one of the most important elements in the compound that make up living organisms. It is found: in the remains of living organisms; as fossil fuels such as coal, coke and natural gas; as inorganic salts such as carbonates; in water bodies and as gas carbondioxide which makes up 0.03% of air.

Carbon is continuously being circulated in the atmosphere through a process called the CARBON CYCLE. This involves the removal and addition of carbon to the carbondioxide in the atmosphere.

Life would indeed cease to exist if this carbon cycle stops due to the importance of carbon to functioning of living organisms. Important processes which bring about the recycling of carbon between living ( biotic) and non living (abiotic) components of an ecosystem are:

--> photosynthesis: the process used by green plants to remove carbon through carbondioxide from the atmosphere for manufacturing of their food.

--> respiration: animals respire to break down sugar leading to liberation of carbondioxide and water as wastes

--> and decay: decomposers feeds on remains and waste to bring about decay, thus complex carbon compounds are broken down to set free carbondioxide which returns to the atmosphere.

All the above processes are carried out by living organisms to maintain a functioning ecosystem by enabling a linear flow of energy through it.

5 0
3 years ago
Chapter 1: Introduction: Evolution and the Foundations of Biology 1. _______ DNA is composed of building blocks called _____. a.
irina [24]

Answer:

C. Nucleotides

Explanation:

Nucleic acids are macromolecules which are polymers of nucleotides. There are two types of nucleic acids namely: deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). Nucleotides are the building blocks of nucleic acids.

A nucleotide is made up of three components:

- A phosphate group

- A five carbon sugar called pentose sugar. In RNA the sugar is ribose sugar and in DNA the sugar is deoxyribose sugar.

- Nitrogenous bases: There are four different types of bases in DNA: adenine, guanine, cytosine and thymine. In RNA thymine is replaced by uracil. Adenine and guanine are purines whereas cytosine, thymine and uracil are pyrimidines.

Nitrogenous base and sugar together are called nucleoside and when phosphate is also attached then it is called nucleotide.

6 0
2 years ago
List 6 thing that causes climate change
hichkok12 [17]

Explanation:

Variations in the sun's energy reaching Earth

Changes in the reflectivity of Earth’s atmosphere and surface

Changes in the greenhouse effect, which affects the amount of heat retained by Earth’s atmosphere

5 0
3 years ago
What part of the human body has the same role as the processor on a computer?
jeka94

Answer:

MRCORRECT has answered the question

Explanation:

Starting from head to toe: Ahuman brain is like acomputer's central processing unit (CPU). In order for both the human body and computerto perform tasks, they need a brain or CPU. The brain and CPU communicate with otherparts of the computer

6 0
3 years ago
Read 2 more answers
Cells that lack a membrane-bound nucleus containing its dna genetic blueprint are called
rjkz [21]
They are called prokaryotic cells
4 0
3 years ago
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