B cells play a crucial role in the defense of pathogens. They are responsible for producing antibodies that help fight the enemy.
The two types would be DNA and RNa
Its called <span>Aortic Arches. Once the earthworm ingests their food it goes straight through their </span>digestive<span> tract which goes down the </span>esophagus<span> then through the crop and gizzard.</span>
The heart has four chambers and four valves that regulate blood flow.
Anatomy:
Left and right atria
Left and right ventries
Mitral valve
Tricuspid valve
Aortic valve
Pulmonary valve
Scientists claim that Bisphenol A when ingested may cause brain problems, behaviour and reproductive development problems in foetus, children and even infants.
Option D.
Explanation:
Bisphenol A was a very common compound to produce polycarbonate bottles. This bottles were very commonly used to produce baby bottles, different beverage containers, different water bottles etc. Until 2010, BPA was allowed as a safe to consume ingredient by WHO but after 2010,they strictly restricted the levels of BPA in food because it has severe ill effects in human body.
Even low amounts of BPA in food can cause hypertension, coronary heart disease, atherosclerosis etc. Although not proven, but BPA is thought to cause cancer. Effects on children and infants are more prominent which can cause problems in development of reproductive structures and brain. Even in adults, the brain problems may lead to change in their behaviors.
