Answer:
The correct answer is: geography and UV radiation.
Explanation:
Skin variation occurred thanks to evolution, and was driven as a consequence of the geographical location of different populations of humans.
The humans that lived in hot and sunny places, closer to the equator, where much more exposed to the sun's ultraviolet radiation. In order to survive the amount of UV lights that they were exposed to, new humans in those regions were being born with a darker skin tone, which was rich in melanin (a brown pigment that protects us from the sun radiation).
Contrary to these humans that lived in the tropical areas, the humans that populated the areas that were closer to the poles, developed much lighter skin as a result of lower amounts of melanin in their skin. Since sun exposure in the poles is very limited, humans needed to receive as much as they could for the production of Vitamin D, and thus, their skins got lighter and less protected.
The correct answer is: d) begins later in life
Eggs or female reproductive cells are formed well before birth in a huge number (primordial oocytes). But, the number of oocyte decreases after birth constantly (there are 2 million oocytes at birth and 40,000 of them in puberty). At menopause, no egg cells are left.
On the other hand, the first sperms are formed only from puberty, but the production of those cells never stops.
The correct answer is it lives inside or on a host.
A is incorrect because a parasite steals from the host, without giving anything in return. Much like a leech
C is incorrect because leeches almost always use their host as a food source
D is incorrect because parasites can often dig beneath the host's skin to be hidden from sight
Answer:
B. Dominant traits
Explanation:
Dominant traits are as what the name implies, dominant over other traits. If something overpowers the other trait then it is a dominant trait.
Answer:
Transform boundary
Explanation:
strike-slip faults- Shearing creates strike-slip faults. Transform boundary. In a strike-slip fault, the rocks on either side of the fault slip past each sideways, with little up or down motion.
