All the spheres interact with other spheres. For example, rain (hydrosphere) falls from clouds in the atmosphere to the lithosphere and forms streams and rivers that provide drinking water for wildlife and humans as well as water for plant growth (biosphere).
Active:requires the assistance of a carrier protein, also requires energy
Passive:does not require energy is also movement of ions and other atomic and other molecular substances.
In humans, one feedback mechanism is to either sweat or shiver, depending on the body temperature. Sweating helps lower the body's temperature, and shivering helps raise the body's temperature.
Answer:
Perichondrium
Explanation:
Elastic cartilage (like hyaline cartilage) has chondrocytes located in lacunae and the tissue is surrounded by a perichondrium. The perichondrium (Figure 7–2) is a sheath of dense connective tissue that surrounds cartilage in most places, forming an interface between the cartilage and the tissues supported by the cartilage. The perichondrium harbors the blood supply serving the cartilage and a small neural component. Articular cartilage, which covers the ends of bones in movable joints and which erodes in the course of arthritic degeneration, lacks perichondrium.
Answer:
1.7 x 107 nucleosomes.
Explanation:
The number of nucleosomes can be calculated by the following formula:
Nucleosomes = Genome size/ total number of base pairs.
Here, the genome size is 3.4×109.
Total number of base pair = number of base pairs in nucleosome core particle + linker DNA.
Total number of base pair = 146 + 50 = 196.
Number of nucleosome = 3.4×109 / 196.
Number of nucleosome = 1.7 x 107 nucleosomes.
Thus, the answer is 1.7 x 107 nucleosomes.