Assuming that you're referring to forest ecosystem, the two ecological benefits of this ecosystem are :
- it provides habitats for many organisms
- It provide Oxygen supply for the world
Answer:
The correct option is <em>B. Crossing- over </em>
Explanation:
In biology, crossing over can be described as a phenomenon by which homologous chromosomes exchange segments during the process of meiosis.
The unexpected results came because the DNA segment between the homologous chromosomes was exchanged during meiosis. The alleles got shuffled by this process and hence showed the unexpected results.
Crossing over and independent assortment are phenomenon which occurs only during the process of meiosis. These phenomenons cannot be observed during mitosis.
Yes the hypothesis of the sea-floor spreads through the ocean ageing
Answer:
I think the answer the will be option
a) the cells form long vertical tubes
Explanation:
This is because xylem transports water and minerals throughout the plant and they are long and vertical tubes
