C) As hydrilla is aquatic in nature, the roots do not have to search for water, and there is no need for xylem to absorb water because the plant is surrounded by water.
Answer:
The correct answer is vertebral column and cranium
Explanation:
Vertebrates are the animals that are characterized by having backbone or vertebral column and apart from the vertebral column they also have a bony skull. Skull and vertebral column protect the brain and spinal cord in vertebrates.
Vertebrata is a subphylum under phylum Chordata and clade Craniata so vertebrates have both cranium and vertebral column. In vertebrates, notochord is present in the embryonic stage and is replaced by vertebral column in adults.
Animals that comes under the Vertebrata are fishes, mammals, reptiles, amphibians, and birds. So the correct answer is B and C.
<h2>a,d,b,c is the correct order</h2>
Explanation:
Before oxygen is picked up in the lungs by hemoglobin, it first diffuses through (a) alveolar cells,d) capillary walls (b) blood plasma, (c) red blood cell plasma membranes
- Although oxygen dissolves in blood, only a small amount of oxygen is transported this way,1.5 percent of oxygen in the blood is dissolved directly into the blood itself and most oxygen—98.5 percent—is bound to a protein called hemoglobin and carried to the tissues
- Hemoglobin (Hb) is a protein molecule found in red blood cells (erythrocytes) made of four subunits: two alpha subunits and two beta subunits
- Each subunit surrounds a central heme group that contains iron and binds one oxygen molecule, allowing each hemoglobin molecule to bind four oxygen molecules
- Molecules with more oxygen bound to the heme groups are brighter red because of which oxygenated arterial blood where the Hb is carrying four oxygen molecules is bright red, while venous blood that is deoxygenated is darker red
- At the same time, carbon dioxide that is dissolved in the blood comes out of the capillaries back into the air sacs, ready to be breathed out
- Oxygenated blood travels from the lungs through the pulmonary veins and into the left side of the heart, which pumps the blood to the rest of the body
- Oxygen-deficient, carbon dioxide-rich blood returns to the right side of the heart through two large veins, the superior vena cava and the inferior vena cava
- Then the blood is pumped through the pulmonary artery to the lungs, where it picks up oxygen and releases carbon dioxide
Answer:
Hyaline cartilage
Explanation:
Endochondral ossification is the process where the bone develops by replacing hyaline cartilage, cartilage serves as a template to be completely replaced by new bone. All of the bones of the body, except for the flat bones of the skull, mandible, and clavicles, are formed through endochondral ossification.
During endochondral ossification, chondrocytes proliferate, undergo hypertrophy and die; the cartilage extracellular matrix they construct is then invaded by blood vessels, osteoclasts, bone marrow cells and osteoblasts, the last of which deposit bone on remnants of cartilage matrix.
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