Chalcopyrite is a copper iron sulfide mineral that crystallizes in the tetragonal system. It has the chemical formula CuFeS₂. It has a brassy to golden yellow color and a hardness of 3.5 to 4 on the Mohs scale. Its streak is diagnostic as green tinged black
Africa and Austrailia ...
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Answer:
False.
True.
True.
Explanation:
Voluntary reflexes close in the spinal cord. (False).
Chains of reflexes conditioned in a certain order are instincts like defense against fire. (True)
The gray matter forms the cerebellar cortex in the large brain. (True)
Voluntary actions are done with consciousness and controlled by the brain, while reflex actions are done with unconsciousness and controlled by spinal cord. Reflex actions are the sudden actions taken by the spinal cord instead of brain because this action is performed quickly in order to avoid the damage.
Answer:
alternation of generations
Explanation:
The expression alternation of generations refers to reproductive cycles that occur in different living organisms, such as those in terrestrial plants, including the occurrence of alternation of generations of terrestrial plants is a characteristic that does not occur in Charales.
The alternation of generations is a phenomenon present in the life cycle of all plants and also in some algae and fungi. This alternation means that during the life of the plant it will go through a haploid phase called the gametophyte, which will alternate with the diploid generation known as the sporophyte. A haploid cell has only one set of chromosomes (n), while a diploid cell has two sets (2n).
