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Anastaziya [24]
2 years ago
10

Help me please and thank you

Biology
2 answers:
oksano4ka [1.4K]2 years ago
4 0

Answer:

B

Explanation:

They have the largest species diversity, also we use the same program for our school.

Anastaziya [24]2 years ago
4 0

Answer:

largest specie diversity

Explanation:

3 million animal species live in rainforests, and 2,500 tree species are found in rainforests also.

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Describe the role of the following cells and structures: mesenchymal cells, osteogenic cells, osteoblasts, lacunae, osteocytes,
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Answer:

<u>Mesenchymal Cells</u> : Mesenchyme in vertebrate is a type of connective tissues found mostly during embryo development.It comprises of ground substance with few cells or fibres.Its is also referred to a group of mucoproteins which are found in different types of cysts resembling like that of mucus. Mesenchymal cells are productive stromal cells  that can be divided into different varieties of cells  like osteoblasts, chondrocytes, myocytes and adipocytes. These are the adult stem cells which are found in the bone marrow.However these cells can be extracted from other tissues including peripheral blood, fetal liver, lung fallopian tube and cord blood. These are found in bone marrow significant for renovation of skeletal tissues such as cartilage, bone & fat found in bone marrow.

<u>Osteogenic Cells :</u> They are the only bone cells which differentiate. They differentiate & forms into osteoblasts  which are responsible for new bones formation. They are located deeper into the periosteum and bone marrow.

<u>Osteoblasts</u> : Osteoblasts work in sets known as osteons to make the osteoid matrix and they release it  at regulated times to develop the new bone tissue where it is mostly required. Osteoblasts formation & activity enlarges in contrast to growth factors & physical activities so that stronger bones can be formed. They are found in large numbers in periosteum and in endosteum. Normally all of the bone matrix in air breathing vertebrates  is mineralized by osteoblasts.

<u>Lacunae</u> :  Lacunae are the small spaces between the lamellae where osteocytes are located.They are linked together by minute networks  called canaliculi. These networks provide a pathway through which a nutritives  reach osteocytes and so the waste products leave them.

<u>Osteocytes</u> :   Osteocytes are the cells which lies within the substance of fully developed bone . It occupies a small compartment called lacunae which is located in the calcified matrix of bone. They are mature osteoblasts which are surrounded by the products they secreted. Osteocytes continue to develop bone to some extent which is significant for the maintenance of the strength and health of bone matrix. However they still perform the functions which are beyond  maintenance.

<u>Osteoclasts</u> : These are large cells with multiple nucleus which are evolved from another types of cells called macrophage. These are the large cells which dissolve the bone. They are derived from bone marrow  and are related to white blood cells. They are found on the bone mineral's surface next to the dissolving bone.

5 0
3 years ago
A worker sprayed fertilizers, which stimulate the growth of native bacteria, on an oil-soaked area. Which one of the following c
serious [3.7K]
The answer is B. A is impossible and C isn't relevant
7 0
3 years ago
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Explain the basis for the great diversity of proteins in living organism.
sashaice [31]

Answer:

Explanation:

Protein functions are so diverse because of the many unique three-dimensional structures protein polymers form. Despite such variety, proteins also share several specific structural characteristics in their monomers, the amino acids. Structural similarities among amino acids make protein synthesis a uniform and regulated process; however, each amino acid contains a unique structural component as well. Specific differences between each amino acid interact to create unique three-dimensional protein structures. Combined, the similarities and differences between amino acids explain how cells can build a diverse pool of proteins from the same set of building blocks. Protein synthesis involves building a polymer of amino acids with complex three-dimensional structure. Dehydration synthesis forms a peptide bond between amino acids and releases a water molecule.

8 0
3 years ago
Describe the structure of nucleus.​
lukranit [14]
<h2>✿━━━━@♥ℳg━━━━✿</h2><h2 /><h2>\boxed{Explained\:Answer}</h2><h2>______________________________</h2><h2 /><h2>✿━━━━@♥ℳg━━━━✿</h2><h2 /><h2>Nuclear membrane</h2>

The nucleus is enclosed by a double layered cellular membrane called the nuclear membrane.

<h2>Nucleoplasm</h2>

The nucleus contains a nuclear sap, enclosed by the nuclear envelope, which is known as the nucleoplasm. This holds the nucleoli and suspends the chromatins.

<h2>Nucleolus</h2>

The nucleolus is a sub-organelle present inside the nucleus. It can be observed as a dark spot under the microscope.

Nucleoli are made up of proteins, ribosomal RNA (rRNA), and ribosomal DNA (rDNA).

<h2>Chromatin network</h2>

DNA gets associated with protein molecules to form chromatins.

Chromatins are present in the nucleoplasm.

5 0
3 years ago
What is weather like in the deciduous forest? What are the five different zones, and how do they differ?
Alexandra [31]

Deciduous forests can be found in the eastern half of North America, and the middle of Europe. There are many deciduous forests in Asia. Some of the major areas that they are in are southwest Russia, Japan, and eastern China. South America has two big areas of deciduous forests in southern Chile and Middle East coast of Paraguay. There are deciduous forests located in New Zealand, and southeastern Australia also.

The average annual temperature in a deciduous forest is 50° F. The average rainfall is 30 to 60 inches a year.

In deciduous forests there are five different zones. The first zone is the Tree Stratum zone. The Tree Stratum zone contains such trees as oak, beech, maple, chestnut hickory, elm, basswood, linden, walnut, and sweet gum trees. This zone has height ranges between 60 feet and 100 feet.

The small tree and sapling zone is the second zone. This zone has young, and short trees. The third zone is called the shrub zone. Some of the shrubs in this zone are rhododendrons, azaleas, mountain laurel, and huckleberries. The Herb zone is the fourth zone. It contains short plants such as herbal plants. The final zone is the Ground zone. It contains lichen, club mosses, and true mosses.

The deciduous forest has four distinct seasons, spring, summer, autumn, and winter. In the autumn the leaves change color. During the winter months the trees lose their leaves.

The animals adapt to the climate by hibernating in the winter and living off the land in the other three seasons. The animals have adapted to the land by trying the plants in the forest to see if they are good to eat for a good supply of food. Also the trees provide shelter for them. Animal use the trees for food and a water sources. Most of the animals are camouflaged to look like the ground.

The plants have adapted to the forests by leaning toward the sun. Soaking up the nutrients in the ground is also a way of adaptation.

<span>A lot of deciduous forests have lost land to farms and towns. Although people are trying to protect the forests some poachers are trying to kill the animals in the forests. The animals are losing their homes because of people building their homes.</span>

<span>
</span>

8 0
3 years ago
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