<span>Ans : The speed of sound is the distance travelled per unit time by a sound wave as it propagates through an elastic medium. At 20 °C (68 °F), the speed of sound is 343 metres per second (1,125 ft/s; 1,235 km/h; 767 mph; 667 kn), or a kilometre in 2.91 s or a mile in 4.69 s.
The speed of sound in water increases with increasing water temperature, increasing salinity and increasing pressure (depth). The approximate change in the speed of sound with a change in each property is:
Temperature 1°C = 4.0 m/s
Salinity 1PSU = 1.4 m/s
Depth (pressure) 1km = 17 m/s</span>
Answer:
From the deepest ocean trench to the tallest mountain, plate tectonics explains the features and movement of Earth's surface in the present and the past. Plate tectonics is the theory that Earth's outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core.
Explanation:
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pick me as the brainliest
It has to be B, because we do not have all the same organs as worms, we have more organs and our brains cannot hold the same amount of information, because flatworms have different nervous systems all together.
So the answer is B.
Answer:
e. none of the above
Explanation:
Prophase-I of meiosis I include the pairing of homologous chromosomes followed by alignment of these pairs on the cell's equator in metaphase I.
During anaphase-I, the homologous chromosomes are separated from each other and begin to move towards opposite poles. Each homologous pair of chromosomes consists of one maternal and one paternal chromosome carrying corresponding alleles for the genes.
The separation of these homologous chromosomes during anaphase-I is random which means that each member of a homologous pair is randomly distributed to one of the poles. The independent separation of homologous chromosomes to the opposite poles results in unique allelic combinations in gametes.
B) can be destroyed by variations in temperature or pH
This is because a change in the temperature or pH changes the shape of the active site of the enzyme so the substrate can no longer bind to the active site. The enzyme has become denatured.