The answer to that my friend is letter A ;)
Frogs are insectivores. If the frogs prey on the gnats and their numbers are decreased, this allows the gnats to proliferate because the competition for survival is lessened. Gnats, being lower on the food chain, have adapted to lay large numbers of eggs due to the environmental pressures under which they evolved (being eaten in large quantities). Therefore, fewer gnats being eaten = more gnats surviving.
Answer:
The correct answer is option c. "cell interactions".
Explanation:
Cell-to-cell interactions, or only cells interactions, refers to the mechanisms that cells have to communicate among them. These mechanisms takes place at the surface of the cells by sending and receiving signals in receptors, which later initiate transduction pathways. Cell interactions play a crucial role in the development of embryos, therefore if a knockout mouse has embryonic lethality due to a disruption in a receptor, it is very likely that the development process that is affected is related with cell interactions.
Answer:
The correct answer is C.
Explanation:
The average lifespan for an elephant can be anything from 50-70 years, but the oldest elephant ever was named Lin Wang, who died in a Taiwanese zoo at the ripe old age of 86. But he managed to fit a whole lot of awesome into his life before then.
Hope this helped.
