The correct answer is:
b.The benefits outweigh the disadvantages.
Explanation:
Natural changes to the ecosystem transfer to the environmental phenomenon that occurs naturally. Natural changes hold floods, volcanic activity, hurricanes, dehydration, and earthquakes. They can be deadly, but they also have benefits.The benefit of the flood is, for example, contributing nutrients to the soil that were wanting. Also, there may be the relocation of fishes and organisms existing in water bodies, which develops the ecosystem.
Pioneer species are found in area's undergoing secondary succession. For example ecosystems being established by: reducing a fire, deforestation; which quickly colonize open spaces supported by vegetation.
Answer is A. A population becomes separated by environmental factors into two groups that do not reproduce with one another.
When a population of a species become geographically separated then gene flow between them stops. Over a period of time, the population may become genetically different in response to the natural selection due to different environments. Selection and genetic drift will act differently on these two separated populations. This will results into two separate species. This type of speciation is called allopatric speciation.
Number 1 is fraternal (also known as dizygotic)
also sorry i don't know the second one
Answer:
endoplasmic reticulum
Explanation:
ER is full with proteins than help to synthesize phospholipids in plant cells
