Primary immune response is response that appears as a result of the first exposure to antigen. On the other side, secondary immune response is the one that occurs when the organism is exposed to the same antigen for the second, third, fourth time. Responding cells of the first immune response are naïve B and T cells (lymphocytes), while responding cells of the secondary immune response are memory T cells. Secondary immune response is much faster (takes shorter time to establish immunity) and amount of antibodies is higher than in primary immune response.
The following are the true statements about seeds;
seeds allow for dormancy until favorable conditions arise -
seeds can resist conditions that would kill a live plant – (such as fire in the case the seed has a hard testa (seed coat))
seeds are key to the wide dispersal of offspring
Answer:
atp
Explanation:
Photosynthesis makes the glucose that is used in cellular respiration to make ATP. ... While photosynthesis requires carbon dioxide and releases oxygen, cellular respiration requires oxygen and releases carbon dioxide. It is the released oxygen that is used by us and most other organisms for cellular respiration.
Answer:
Explanation:
Benefits of rainforest ecosystems. 1. Preservation of species. Because they are so biodiverse, healthy rainforest ecosystems are the perfect places to preserve huge numbers of species that would otherwise be endangered.
