<span>Primary immunodeficiencyvdiseases are a group of more than 250 rare, chronic disorders that affect how the body’s immune system works. Primary immunodeficiency diseases are caused by genetic defects. I hope this helped</span>
Answer:
Protective covering called Perdium
Explanation
Fungal spores are agents of asexual reproduction in Fungi.
The function is to protect the spores in fungi.It may be thick or thin depending upon the species. When the layers are two in number,
It is true that telomerase activity declines with old age which explains why cells lose their ability to divide after many replications.
Telomeres are DNA–protein complexes found at the ends of each chromosome they contain repetitive sequences of DNA. Telomeres protect the genome from nucleic bases degradation, unnecessary recombination, repair, and prevent the fusion of chromosomes. Telomeres, therefore, play a vital role in preserving the information in our genome.
Telomeres shorten with every consecutive DNA replication cycle limiting the number of cell divisions a cell can undergo, Telomeres act as a tumor suppressor by halting the replication of cells which contains several mutations after many division cycles.
To learn more about tumor suppressors here
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Answer:
B fresh water. salt water is a mixture found in oceans. hope this helps!
Lysosomes are a type of <span>cell organelle filled with enzymes needed to break down nutrients, bacteria, and old organelles</span>
