During the course of initiating the scientific method, the hypothesis is considered the first major step. Before that would be identifying a subject and observing a particular issue, animal, etc.
Answer:
Explanation:
This is the process of muscle contraction and relaxation in the muscle. The type of muscle involved is the skeleton muscle.
The process is initiated in the Central nervous system. Examples are in contraction of biceps and triceps.
It involves myosin head and actin filament coupled with the release of calcium ion from the sarcoplasm reticulum: this ion activates this process in the muscles. With the exposure of the music binding site on the acting filament, myosin is able to bind to acting filament bringing about this process.
a. ATP attaches to myosin head
b. Myosin head is re-energized
c. Myosin head forms cross bridge with actin
d. Power stroke moves thin filament
e. Cross bridges detach from actin
f. Myosin binding sites covered
g. Calcium ions pumped into the sarcoplasmic reticulum
h. Calcium ion concentration decreases below the threshold for binding to troponin.
Answer:
sophisticated irrigation, chemical fertilizers, chemical pesticides
Explanation:
The use of irrigation to provide needed water and the use of natural fertilizers to promote crop growth are farming methods that have been practiced for centuries. More sophisticated irrigation techniques, various chemical pesticides, and modern chemical fertilizers have been developed in the twentieth century.
Answer:
D
Explanation:
D is mitochondria, which are organelles that act like a digestive system which takes in nutrients, breaks them down, and creates energy rich molecules for the cell. The biochemical processes of the cell are known as cellular respiration.
Bio-Engineering is the use of living vegetation, either alone or in conjunction with civil engineering structures and non-living plant material, to reduce shallow-seated instability and erosion.
<u>Explanation:</u>
DEVELOPMENT OF BIO-ENGINEERING:
In Germany and Austria wishes to use the low-cost local materials and traditional constructions due to their Financial restrictions of pre-war years 1930's
ADVANTAGES OF BIO-ENGINEERING:
Re-establishing vegetation and store the hydrology from the surface to control of accelerated erosion.
Cost-effective treatments:
- landslides
- Roadside failures
- River stream banks
- mining reclamation.
EXAMPLE:
GRASS PLANTING
Usually planting the large grass clumps in lines across the slope.
Horizontal lines are used to increase the protection against erosion.
