Domain Archaea
Like bacteria,Organisms in domain Archaea are prokaryotic and unicellular. Superficially, they look a lot like bacteria, and many biologists confused them as bacteria until a few decades ago.
Answer:
Water and temperature
Explanation:
Water and temperature are the two most important factors that regulate the distribution of organisms in terrestrial habitats. Water is required for survival by living beings. The availability of water is limited in many habitats such as desert habitats. In such land habitats with water scarcity, the organisms adapted to withstand the limited water availability are found.
Likewise, temperature also affects the distribution of organisms in terrestrial habitats. The presence of temperature conditions below and above the tolerance range of the organisms restricts their geographical distribution. Temperature regulates the enzyme kinetics. Metabolic pathways are catalyzed by enzymes that function under optimal temperature conditions only. Water serves as a medium for metabolic reactions and also regulates body temperature.
Answer:
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Answer:
Lipid soluble hormones:
Lipid soluble hormones are hydrophobic in nature and contains hydrophobic signals. Their receptors are present inside the nucleus and some are limited to cytosol as well. The binding of the receptor to its ligand stimulates the synthesis of new protein. The binding of hormone response element binds to the enhancer region of DNA. Example: steroid hormones and thyroid hormones.
Water soluble hormones:
Water soluble hormones are hydrophilic in nature and contains hydrophilic signals. Their receptors are present on the cell membrane . The binding of the receptor to its ligand stimulates the signaling cascades mechanism. The binding of hormone to its receptor results in the activation of protein kinase and secondary messenger.
Two atoms that contain the same number of protons but different neutrons are isotopes of the same element.their masses are different but they react the same way chemically
