Answer:
Scientific theories are based on large amount of evidence
Explanation:
The Haber process converts nitrogen gas into ammonia<span> used in fertilizers. </span>Ammonia<span>is converted to nitrates by nitrifying </span>bacteria in the soil<span>. Plants absorb nitrates from the </span>soil<span> and use these to build up proteins. The plant may be eaten by an animal, and its biomass used to </span>produce<span> animal protein.</span>
Answer:
The suitable words for fill in the blanks will be -
- embryo
- flippers
- disappear
- off
- genetic
Explanation:
Examining a dolphin embryo highlights its evolutionary history. Early in dolphin development, both fore and hind limb buds form. While the forelimb buds continue to develop into flippers, the hind limb buds disappear. The genes that are normally active in the hind limb buds of four-limbed animals are turned off. A genetic change leading to the silencing of a trait during development may have been an important milestone in cetacean evolution.
<span> a </span>girl's<span> breasts may start to grow, but she may not get her period until years later. You may continue to go through </span>puberty<span> changes until you're 20 years old.</span>