Coal from swamp plants that formed millions of years ago.
Answer: tympanic membrane
Answer: etiolation of plant growth in shade, with fast growing cell without chloroplasts. Out of shade, cell differentiate again to produce photosynthesising cells
Explanation: It is a subjective decision as to what is ‘best’. Good examples are plant responses to changes in the nutrient supply.
when soil nitrogen is depleted some plants, such as legumes, grow nodules on their roots, with cells that release chemical signals to attract nitogen fixing bacteria.
Lack of light induces etiolation in many plants. New cells elongate and develop without chloroplasts, with rapid cell division exhibiting gravitropism, extending upward. When they grow beyond the shade area, cell differentiation changes again, to produce photosynthesising cells.
Scientists believe that at first these bears scavenged seal carcasses that had washed ashore, and gradually began to hunt the seals by waiting at the water's edge as the seals surfaced to breathe. This is believed to be an important step in the evolution of a new bear species, the polar bear
Over time the new polar bears were used to the cold climate and learnt how to fish, they then separated from the grizzly bears, they developed new creatures which would help them survive in one of the most dangerous climate.
d. CO (carbon monoxide) is not an acidic oxide.
Acidic oxides are those oxides which either act as acceptors of the hydroxide ions (OH-) and function as a Lewis acid or they produce an acidic solution when added to water. Examples of acidic oxides are P4O10 (Phosphorus pentoxide), P4O6 (Tetraphosphorus hexaoxide), SO3 (Sulfur trioxide), SiO2 (Silicon dioxide) etc.
Neutral oxides do not show either of the basic or acidic properties. Due to this fact, they do not form salts when they react with acids or bases. Examples of neutral oxides include CO (carbon monoxide), NO (Nitric oxide), N2O (Nitrous oxide) etc.
Hence, option d is correct.
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