Answer:
7.112× 10⁸.
Explanation:
The length of DNA is 2.5 nm = 2.5 × 10⁻⁹m.
The average human length = 5 ft 10 in = 70 inch.
1 inch = 0.0254 m.
70 inch = 70 × 0.0254 = 1.778 m.
Number of DNA molecules = length of man / length of DNA.
Number of DNA molecules = 1.778 m / 2.5 × 10⁻⁹m.
Number of DNA molecules = 7.112× 10⁸.
Thus, the answer is 7.112× 10⁸.
Answer: An observation is something you sense: taste, touch, smell, see, or hear. An inference is something you decide or think about a thing or event after you observe it.
Examples: I observe that this shoe smells musty. (Observation) I infer that my teacher has a kid.
Soil pollution: Because of the depletion of microbe biodiversity in soils, crop production now necessitates the use of fertilizers and pesticides. The value of good soils must be encouraged and understood.
Habitat loss: Food processing necessitates the use of both water and energy. If nothing is done, the global food system may lead to rapid and widespread biodiversity loss. Agriculture occupies half of the world's habitable (ice-and desert-free) land.
Source; https://ourworldindata.org/environmental-impacts-of-food
http://www.hopeaustralia.org.au/uploads/media/Soil-and-Food-Security-by-Shannon-Michael.pdf
Answer:
In the course of evolution mammals are the animals which are evolved recently as compared to other groups such as fish, amphibians, or reptiles.
In addition, fur or hairs on body, mammary glands, middle ear bone, warm-blood, et cetera are the characteristics of mammals.
These characteristics were evolved during the course of evolution; they were not present in ancestral organisms.
However, tail, gill pouches, et cetera are characteristics of our ancestral groups. Thus, characters can be sometimes observed in mammals.
But mammals characteristics can not be observed in organisms which were evolved before mammals such as fishes, amphibians, reptiles, et cetera.