Answer:
The answer is C.
Explanation:
Halogens occupy Group 17 of the Periodic Table. This group contains six different nonmetallic elements.
B cells mature in the bone marrow or in the lymph node. Hope I could help!
Answer:
A. X, because organism X has the same role as the grasshopper
Explanation:
In the food web the organism is denoted by X and it shares the same role as the grasshopper.
A primary consumer is mostly a herbivore. They feed directly on plant matter and convert them into useful nutrition for their own needs.
- Grasshoppers feed on grasses.
- They are able to process plant matter into digestible food materials.
- Organisms of this kind are primary consumers.
- Organism such as Y are the secondary consumers.
- They feed on other organism but not directly on the plants.
Answer: That is false
Explanation: Catfishing is a deceptive activity where a person creates a fake identity on a social network account.
Answer:
B) astrocytes
Explanation:
Cells other than neurons that play an important role in the normal functioning of nervous system are called Neuroglia or glial cells.
Satellite cells, astrocytes, schwann cells and oligodendrocytes are all examples of glial cells.
⇒Satellite cells provide protection and nutrition to cells in peripheral nervous system ( peripheral nerves and ganglia).
⇒<em><u>Astrocytes</u></em> play an important role in central nervous system (brain and spinal cord). They provide protection to neurons, scavenge ions, form the blood-brain barrier and also maintain extracellular environment suitable for neuronal functioning.
⇒Schwann cells are found in the peripheral nervous system and myelinate the axons of neurons.
⇒Oligodendrocytes are found in central nervous system and produce myelin sheath which myelinates (insulates) axons of neurons. Their function is similar to schwann cells but in the central nervous system.
From the above discussion it is clear that the answer is B) Astrocytes as these maintain a suitable chemical environment for the neurons.
