The average girl about 5'0 tall
Answer:
Explanation:
The first mass extinction is called the Ordovician-Silurian Extinction. It occurred about 440 million years ago, at the end of the period that paleontologists and geologists call the Ordovician, and followed by the start of the Silurian period. In this extinction event, many small organisms of the sea became extinct.
Answer:
Negative feedback.
Explanation:
It is negative feedback because the reactions triggered by low glucose levels are trying to rebalance the glucose concentrations in our body to make it work properly.
In positive feedback, a product will only stimulate more the components that lead to that product to produce more of it, increasing the product's effect and an imbalance.
The intensive system of keeping livestock is performed to cater the need of growing population, as people are declining day by day, who can afford to opt for their personal cattle. Thus also known as factory farming, where large amount of cattle are treated with full hygiene and facilities to produce more products like milk and milk products, egg, meat, etc. and with less cost. The basic features of intensive system are as follows:
- The area required for such farming is small as compared to general, thus less land can fulfill the need of large population.
- The method and technology used give employment to skilled workers and follow more rules and regulations to protect livestock from diseases.
- Help in maintaining economical aspects in national level, by increasing production in bulk with comparatively less input.
Answer:
An immunized person can show false positive results during the test.
Explanation:
BCG (bacille Calmette-Guerin) is the vaccine which is given for tuberculosis. This vaccine is used in many countries in which the chances of spreading Tb is high in children which causes meningitis and miliary disease in children.
In United States, BCG is not recommended because the risk here is very low and the vaccinated person can show false-positive results for the disease which will result in hindering the work of epidemiologists who are tracking how and from where disease spread.