Answer:
C. Platelet adhesion
Explanation:
Platelet adhesion comes first in the process of hemostasis.
The process of hemostasis has got three phases:
- Vascular spasm
- Platelet plug formation
- Blood coagulation
The process occurs in the body in the event of a bleeding injury.
In the first phase, damaged blood vessels constrict to prevent more bleeding.
In the second phase, platelets adhere to damaged endothelium to form platelet plug.
In the third phase, fibrinogen is converted to fibrin to form a clot.
Unicellular organisms
Explanation:
Unicellular organisms typically respires faster to release energy.
Respiration is a gaseous exchange between cells and the environment. Here, oxygen is taken in by the cell and carbon dioxide is the by product of the metabolic process.
- Unicellular organisms will respire faster because they are at the lowest level of organisation.
- The cells are in direct contact with the environment.
- They do not require special set up to obtain and circulate oxygen in them.
- The waste of the metabolic process is also discarded easily and very fast.
- Organisms at lower levels of organisation typically have a faster rate of respiration.
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I believe it'll be corn since it's a plant which created c4 sugar when performing photosynthesis.
Answer:
Tolerance to heat, light and parasite.
Explanation:
Characteristics of tolerance to heat, light and parasite are the three reasons that might use a higher percentage of Nguni on the sector of livestock farmers in South Africa in 2003. The temperature of South Africa is extremely high which can be tolerated by the Nguni cattle due to its good characteristics. The Nguni cattle can bear extreme temperature, high intensity of light and resistance to parasites make it best suited for that environment.
Answer;
Primitive streak.
At the onset of the embryonic period, the primitive streak appears. It will eventually become the neural tube.
Explanation;
The primitive streak is a transient structure which forms on day 15 of human development.
It marks the start of gastrulation; the process in which the inner cell mass in converted into the trilaminar embryonic disc.
It originates from the anterior epiblast.
