Energy decreases as you go from the bottom of the food pyramid (plants) to the top of the food pyramid (carnivores)
Answer: A. herbivorous birds that are able to migrate great distances.
Explanation:
Herbivorous birds that are able to travel great distances will simply fly from section to section to look for whatever food that they want.
The division of the forests is therefore irrelevant to these birds unlike other animals such as mammals which would have to travel great distances in order to get to another sector. Sectors would therefore keep such animals away from other organisms in other sectors in order to protect the uniqueness of both.
Answer:
To practice the Four-Square Strategy, draw a large square on a fresh page of your vocabulary notebook and divide the square into four smaller squares. Then draw a circle right in the middle. In the circle, write the vocabulary word. In the top left square, write its definition in your own words.
Answer:
C) Release of von Willebrand factor (vWF) from the endothelium, not the epithelium.
Explanation:
Hemostasis is the physiological process of reparation and maintenance of a blood vessel to stop excess loss of blood in case of vascular injury. This process occurs in four stages:
- Vascular Injury i.e. a breach in the endothelial barrier. This results in the dislodge of endothelial cells, exposing the collagen fibers underneath.
- Vascular constriction or vasoconstriction is the constriction of the blood vessels to prevent excessive blood loss.
- Platelet plug formation involves the aggregation and adhesion of platelets to the endothelium.
- Coagulation
Platelet plug formation occurs by the adhesion of circulating platelets to the collagen fibers that have been exposed by dislodging of the endothelial cells. The endothelium, as well as the platelets release a ligand known as the von Willebrand factor (vWF). This molecule acts as a relay or bridge between the integrin receptors on the platelets and the exposed collagen fibers.
Platelets also release chemicals to attract more platelets to the wound site, resulting in more vWF release. This results in more and more platelets adhering to the endothelium, leading to platelet plug formation.
A. Chloroplasts are where photosynthesis occurs.