The type of immunity that provides lifetime immunity for the body against a specific pathogen is called acquired immunity. It is also referred to as adaptive or specific immunity.
Acquired immunity is not present at birth. it is learned. As a person's immune system encounters foreign substances (antigens) the components of acquired immunity learn the best way to attack each antigen and begin to develop a memory for that antigen. Acquired immunity is also called specific immunity because it tailors its attack to a specific antigen previously encountered. Its uniqueness lies in its ability to learn, adapt and remember.
Acquired immunity takes time to develop after first exposure to a new antigen. However afterward, the antigen is remembered, and subsequent responses to that antigen are quicker and more effective than those that occurred after first exposure. Memory of a particular antigen is kept by the B and T lymphocytes.
Answer:
The methods by which DNA molecules multiply is known as REPLICATION
Explanation:
DNA REPLICATION.-
In all living organism DNA replication occurs. IN replication DNA replicates in this way making its replica or we can say its copy.
During replication, both the strands of DNA are separated first. Then each DNA strand function as the template and makes its own copy to make the full DNA molecule. This is the SEMICONSERVATIVE mode of replication. In which each DNA molecule has one parent strand and one newly synthesized strand.
The replication start sight is ORIGIN OF REPLICTION( in E.coli ori c). At this location Helicase enzymes help in opening of the DNA.
The enzyme which has very unique function of adding nucleotide on the DNA strand and synthesizing DNA is DNApolymerase.
DNA replication occurs in 3' to 5' direction.
Answer:
polymerase chain reaction
Explanation:
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Answer:
Coding for the production of all cells protein
Explanation:
Chromosomes are long sequences of DNA that contain several genes and other sequences of nucleotides. In eukaryotic organisms, chromosomes are linear structures of highly stranded double-stranded DNA, normally found in the nucleus of cells, and may also be associated with proteins and RNA. In prokaryotic organisms, they have a circular or linear shape, not being present in the nucleus or associated with proteins.
In addition, chromosomes are the molecules responsible for controlling cellular processes. They do this by coding the production of all proteins in a cell.
Answer:
coding for the production of all a cell's proteins
Explanation:
sends signals
between the
brain and body
protects the skin
from bacteria and
other particles
allows shivering
to produce heat
to maintain body
temperature
provides structural
support for the
organs
Nervous Tissue
Muscle Tissue
Epithelial Tissue
Connective Tissue
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Sends signals between the brain and body - Nervous Tissue
Protects the skin from bacteria and particles - Epethelial Tissue
Allows shivering to produce ear and maintain body temperature - Muscle Tissue
Provides structural support for the organs - Connective Tissue
Answer:
Nervous Tissue
Epithelial Tissue
Connective Tissue
Muscle Tissue
Explanation:
sends signals between the brain and body - nervous tissue
protects the skin from bacteria and other particles - epithelial tissue
allows shivering to produce heat to maintain body temperature - muscle tissues
provides structural support for the organs - connective tissue
Nervous tissues are distinct type of tissues within the nervous system responsible for the communication and control between the brain and the rest of the body. They communicate by sending signals between the brain and the body parts.
Epithelial tissues are specialized tissues that line and protect the surfaces of organs both within and outside the body. A special epithelial tissue covers the skin and protect it from bacteria and other particles.
Connective tissues are those found in between other tissues of the body and serve supportive and protective functions.
Muscle tissues are soft tissues that serves to allow movement of body parts as a result of contraction.
The biodiversity of the islands has decreased.
The biodiversity of the islands has remained the same.
The biodiversity of the islands decreased, then increased.
Answer:The biodiversity of the islands has decreased.
Explanation: Galapagos Islands is located in an island in Equador, it is at this island that Charles Darwin carried out his biodiversity experiment. The island is known to contain a wide range of diverse species that are unique to the Galapagos Islands.
The biodiversity of the Island is been threatened in recent times due to destructive activities of Humans,people are introducing Alien species like the Goats now introduced into the farm by some farmers years ago, the dumping of refuse,the high rate of buildings coming up around the island and the influx of Tourists all these are making the Inherent species to find the environment unattractive any longer hence, they are going into extinction.
Answer:
B.The biodiversity of the islands has decreased
Explanation:
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