Answer: Over 4 billion years ago
Explanation: The chemical reactions between carbon and water is said to bring about life according to scientists. These reactions builds largely upon four families of chemicals (lipids, carbohydrates, amino acids, and nucleic acids).
However, the actual time of life on Earth has varying speculations from different scientists in fields of study (such as molecular biology, chemistry, oceanography, etc).
Furthermore, microfossils within hydrothermal-vent precipitates dated from 3.77 to 4.28 billion years is presumed to inhabit the oldest record of life on Earth. Hence, which is presumed to have occurred after ocean formation 4.4billion years ago.
Thus, the actual date of the chemical reactions that brought about life is not rigid, but presumed to have occurred over 4billion years ago (according to research).
B. CONSISTENCY.
Soil consistency is most dependent on soil moisture.
Soil consistency are identifies as Moist Soil, Wet Soil, and Dry Soil.
Moist soil are loose when dry or wet, friable (using gentle pressure), and firm (using moderate pressure)
Wet soil are plastic and sticky.
Dry soil are either soft or hard.
Primary consumers are represented with a “C.”
During DNA replication, the hydrogen bonds must be broken between the complementary nitrogenous bases in the DNA double helix. Hope this helps! Maybe mark me the brainliest??
Answer:
C. interfering with the normal transmission of ADH to the posterior pituitary via the axons of hypothalamic neurons
Explanation:
nephrogenic diabetes insipidus results from failure of the kidneys to respond to ADH,
Central diabetes insipidus head injury or blow that cause damage to the hypothalamus or pituitary gland
