Answer: Option B
Explanation:
The bacteria and viruses in the class that is being released from classmates ans instructor is enough to cause disease but it is killed before it causes disease in the body.
This is so because the human body has immune system that consists of various mechanism that helps in killing the harmful pathogens.
The microbes present in the air is inhaled and the mucous membrane in the nasal passage swallow the pathogens and they are killed in the acidic environment.
The environment inside the stomach is highly acidic which does not allows the sustainability of the pathogen inside the body.
The mutation caused a advantage in its living area making it easy to reproduce and thrive
These are called Cell organelles.
Explanation:
- Cell membrane and cytoplasm are present in prokaryotes also.
- In eukaryotes specialised organelles are present that have a definite structure, definite shape and definite function.
- These organelles and their function are:
a) Endoplasmic reticulum: It form s the supporting frame work of the cell and serves as the pathway distribution of material.
b) Golgi apparatus: Synthesis and secretion of enzymes and hormones.
c) Ribosomes: Site of protein synthesis
d) Lysosomes: intracellular digestion,destruction of foreign substances,formation of bones by digesting cartilage
e) Centrosomes: Found only in animal cell Initiates and regulates cell division.
f) Plastids: present only in plands. Contain colour pigment and are responsible for carrying out photosynthesis,providing colour and storing starch.
g)Mitochondria: Known as the power house of the cell and is involved is ATP production.
h) Nucleus: Known as the brain of the cell and controls the functioning of the cell.
Answer:
Heterozygous (AB) for the STR locus = Allele (A) x allele (B) = 0.02 x 0.03 = 0.0006
Explanation:
The probability of the heterozygous genotype AB is equal to the product of the probabilities of these two independent events (i.e., independent events represented by allele segregation)= 0.02 x 0.03 = 0.0006