The upper respiratory tract includes the larynx, the pharynx and the nose.
Glucose i believe ... , if not , im sorreh >.<
Answer:
The statement is true
Explanation:
Hematopoietic stem cells give rise to myeloid progenitor and lymphoid progenitor and these two progenitors give rise to many immune cells. Dendritic cells are produced by both the progenitors and macrophages are produced by myeloid progenitor.
Both macrophages and dendritic cells are phagocytes. In phagocytosis, the foreing particles are injected by these phagocytes and they are destryoyed by the action of digestive enzymes present in these phagocytic cells.
Macrophages are present in tissue and if they are present in blood they are called monocytes. Therefore the statement is true.
Answer:
A farmer’s crop failed to give a good yield due to the following reasons.
1) Nutrients are not sufficient for the crop or nutrients are present in very high amount in the soil which causes toxicity.
2) If proper irrigation is not applied to the field.
3) If the seeds are not of good quality, the yield is also reduced.
The right time to spray weedicides are 30 to 40 days after sowing.
Flowers and their insect pollinators are a classic example of coevolutionnnn