Answer: 5%
Explanation:
The Prevalence rate is the term used to describe the percentage of a population that have contacted the disease being tested for. It is usually done over a certain period or a certain time.
The prevalence of TB in the screened community on January 1st therefore is;
= Number of infected/ No. of Tested residents
= 10/200
= 5%
The mechanical and chemical receptors that control digestive activity are located in the walls of the tract organs.
The right answer for the question that is being asked and shown above is that: "selective cutting" This type of harvesting leaves behind a diverse forest. The type of harvesting is called the <span>selective cutting.</span>
Answer:
Organism in a lichen that provides protection - algae
Organism in a lichen that provides nutrients through photosynthesis - algae
Branched growth form of lichen - fruticose
Leafy growth form of lichen - foliose
Small and flat growth form of lichen - crustose
Explanation:
<em>Lichens are composite organisms that are formed from symbiotic relationships between fungi and cyanobacteria/algae. The Green algae layer offers food to the fungi by photosynthesis while the latter supplies nutrients and offers protection to the algal component. </em>
There are different types of lichen based on the growth structure:
Fruticose lichens grow upright and shrubby and posses either round or flat branches.
Foliose lichen appears like a leaf with upper and lower layers. They are usually flat or convoluted in nature.
Crustose lichens are small in appearance with flat, crusty growth on surfaces on which they grow.
