Erosion and mixed composition. Wind,rain have a way of mixing and can create crystals
Answer: A . Has its collagen fibers randomly orientated.
Explanation:
In the microscopic anatomy of the bone, an osteon (basic microscope unit of the bone) can be arranged into two categories; woven bone or lamellar bone.
As the name suggests woven bone is characterized by the random orientation of the collagen fibers . These collagen fibers haphazardly form to give the visual appearance of an intertwined (woven) network of collagen fibers.
Due to the randomness of the collagen fibers orientation woven bone is thus mechanically weaker than lamellar bone. Woven bone is formed/produced when osteoblasts produce osteoids rapidly within the bone matrix thus woven bone has the ability to form quickly as needed.
Woven bone is thus immature bone or pathologic bone with no stress orientation, it has a high percentage of osteocytes per unit volume and a high rate of turnover.
Answer:
Many people are familiar with hibernation, the winter practice of some mammals such as bears, and even some plants. It is commonly thought that snakes also hibernate because we don’t see them as much in the colder months, but this assumption is mistaken and could lead to unexpected – and likely unwanted – snake run-ins.
Hibernation is the state of very deep sleep where the animals or plants will stay dormant to conserve energy until the cold season passes. For example, bears will often gorge on food to build up their fat stores then go into hibernation because their food source will be very low in the winter months. The hibernation state helps them survive the winter by lowering their body temperature, slowing their heartbeat and breathing, depressing their metabolism, and exerting little to no energy. Their bodies then use up the stored fats to maintain their necessary body processes and to keep them warm through the season.
Unlike mammals, snakes don’t go into full hibernation. Instead, snakes enter a similar state called brumation.
Answer:
Seven important organelles in a plant cell-
1)Plastids
2)Mitochondria
3)Nucleus
4)Golgi bodies
5)Endoplasmic Reticulum
6)Ribosomes
7)Vacuole
Explanation: