Answer:
Explanation:In the drip irrigation, we lay plastic pipes in rows near the crops or plants. These pipes have holes in them. The water seeps from these holes drop by drop, hence the name drip irrigation. Drip irrigation is one of the most efficient irrigation methods as it reduces water wastage in agriculture
Answer:
The assimilation of the primary consumer is 5000 kcal/m2/yr, option C.
Explanation:
From the information in the question, the Net Production Efficiency, NPE can be calculated using 100Cp/AS.
Where CP is the consumer productivity and AS is the Assimilation.
Therefore, 20 = 100 x 1000/AS
AS = 100,000/20 = 5000 kcal/m2/yr. Option C.
Plasma membranes regulate what substances go into and out of the cell and helps provide a barrier to bad toxins or bacteria. It is also allows necessary proteins in and keep pathogens out. The ersearch on plasma membranes is very important i justified with the following:
- stydying the plasma membrane's interaction nutrients helps to understand the way in which active tarsnport occurs
- helps to undertand the communication between cells.
Answer:
Human blood contains a buffer of carbonic acid (H2CO3) and bicarbonate anion (HCO3-) in order to maintain blood pH between 7.35 and 7.45, as a value higher than 7.8 or lower than 6.8 can lead to death. In this buffer, hydronium and bicarbonate anion are in equilibrium with carbonic acid.
Every plant organ is adapted to its function. For example, leaves that are big and flat absorb plenty of sunlight for photosynthesis. Long roots keep a tree stable and take water from deep in the soil. Some plants have unusual adaptations.