Answer:
they lack chloroplats
Explanation:
chloroplasts are the base of photosynthesis
Antibodies are produced when the body is exposed to a pathogen. Antibody production is a function of the specific immunity arm of the immune system.
During the first encounter with a pathogen, antibody production against that pathogen is a bit slow and not very vigorous. However, memory of that pathogen is kept in memory cell which are a type of lymphocyte.
On a second encounter with the same type of pathogen, the immune system specifically remembers the pathogen and the response this time round is faster, very vigorous, specific and very effective.
Vaccines follow this principle, making good use of immune memory.
2Al2O3-->4Al+3O2
next time find the correct category to ask questions
Answer:
an eclipse in which the moon appears darkened as it passes into the earth's shadow.
Explanation:
Answer:
The correct option is this: THE POTATO ORIGINATED IN IRELAND.
Explanation:
In 1800, the country of Ireland experienced potato famine, during this period a lot of people died from starvation. The principal reason why this event occur is because most of the potatoes in the country at that time were genetically similar. These potatoes were propagated from cuttings of the same plants, thus, their biodiversity level were quite low. This hamper their ability to resist the fungal disease that destroyed all the potatoes in the country at that time. The variety of potato planted in Ireland at the time of famine was lumper potato, this potato specie originated from another country.
