In pinus species male cone matured earlier than female cone because it male cone producing more pollen grain.
Explanation:
Pinus species don't have flowers who has nectar and pollen. Pine trees can’t attract bees and butterflies for pollination. Wind play vital role for pollination in pinus species tree.
The male cones produce producing pollen grains, which drift to the female cones on other trees. After few years mature the non-fertilized female pine cone mature to become the woody cones
The myelination of axons or the presence of the myelin sheath regulates the conduction velocity of the nerve impulses by acting as an insulator to the nerve fibers. The spaces or gaps between each myelin sheath are called the nodes of Ranvier and the impulse go from one node to another. This phenomenon is called saltatory conduction.
Nice to know: The myelin sheath in the central nervous system is provided by cells called oligodendrocytes. On the other hand, the myelin sheath in the peripheral nervous system is provided by cells called the Schwann cells.
Answer: four (4)
Explanation:
The two 3-carbon molecules in which glucose is split are DIHYDROXYACETONE and GLYCERALDEHYDE 3-PHOSPHATE.
These two are ISOMERS and are converted through a series of five steps into the final 3-carbon molecule called PYRUVATE, CH3COCOO
During these later steps KNOWN as the PAYOFF phase (phase II) of glycosis, FOUR (4) molecules of ATP are made.
The blood is the means by which circulating several fundamental chemicals to the body balance. Consumptiom metabolism, control and structural depend on the exchange of various substances with the environment, like oxygen, carbon dioxide, glucose, amino acids and nucleic acids. Is the blood these exchanges are guaranteed. In addition, several defense cells of the organism (macrophages and lymphocytes) are present stop are essential and in the bloodstream for homeostasis. These and many other many defined do make blood a factor of great importance for the living.
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The nervous system is responsible for the many actions and movement of the body. It is an organ system that sends and receives, even also influences many cellular and organismic phenomenon.
A nerve damage at a specific area for example a nerve damage was incurred for your right hand, since the nerves in that area were destroyed or were paralyzed the dendrites are unable to receive and the terminal buds are unable to send a specific neurotransmitter called the acetycholine for the muscle cells to initiate and process the enzyme which enables the muscle to interact and react.
