Answer:
The most appropriate answer would be b. gene flow at work.
Transfer of pollen grain forms the example of vertical gene transfer that is, transfer of a gene from parent to the offspring.
A pollen grain is the male gamete of the parent plant. It contains the genetic material or information of the plant.
It is pollinated or transferred to the stigma of the plant of same species with the help of air, water, bees et cetera. Successful pollination results in the formation of the zygote.
Thus, gene or genetic material is transferred from parent plant to the offspring. Hence, the student can use "gene flow at work" as the caption of the picture.
Natural selection would cause speciation because the new advantageous traits introduced in the population would help species survive and adapt to the new environment they are in because of isolation. The ability to make best from available leads to speciation in isolation.
Explanation:
Natural selection is a an important element of evolution. The change in traits which are beneficial and heritable are transferred from one generation to other. These traits come from random mutations.
Speciation is a process in which an existing population diverge in to two distinct population or species due to geographic barrier or without it also. The speciation occurs when species from one group become reproductive isolated.
When a group of species become isolated on an island or some other geographic boundary.
The increase or introduction of new beneficial genes in a population is caused by natural selection process. The populations manage to survive and adapt the new environment and become a new species if left isolated.
They gives us oxygen, they store carbon for us, and they provide materials for tools and shelter for us.
The
peripheral nervous system (PNS) consists of nerves that transmit impulses back
and forth between the central nervous system, the skeletal muscles, and the
skin.
<span>The
PNS consists of the nerves and ganglia that are located outside the brain and
spinal cord (CNS). The main function of the PNS is the connection between the
brain and spinal cord and the rest of the body.</span>
Answer:
Evidence for these geomagnetic reversals can be found in basalts, sediment cores taken from the ocean floors, and seafloor magnetic anomalies. Reversals occur nearly randomly in time, with intervals between reversals ranging from less than 0.1 million years to as much as 50 million years.
