<span>The
answer is A. The reduction in variety reduces the number of alleles for
each gene in the gene pool. This reduces the variations in the phenotypes of the crops. A disadvantage of this phenomenon is that it
would be difficult for the crops to withstand
environmental changes and calamities because there is no wide variation on
which natural selection could act upon to
enable the crops to adapt to these changes.</span>
any agent that cause a mutation would be called a mutagen
The table given in the figure below reflects the data being referred to (from the book: <em>Campbell Biology Australian and New Zealand Edition </em>by Reece, et al. (2014)).
The number 22,877 of the gene that encodes the first protein with the protein ID 298599 indicates that the
amount
of the RNA transcript of this gene made in the mycorrhizal
parts of the fungus was 22,877 times higher when they were associated with the Douglas fir compared to those made in soil mycelium away from the root of the plants.
The
correct answer is the gastrocnemius muscle.
<span>The
gastrocnemius muscle is a muscle located in the back part of the lower leg of
humans. The gastrocnemius together with the soleus muscle forms half of the
calf muscle with the function is plantar flexing the foot at the ankle joint
and flexing the leg at the knee joint.</span>
<span>The energy pyramid is shaped like a triangle to show how not all the energy of one organism transfers to the next level. The triangle decreases in size going up as does the amount of energy transferred. A graphical model that is shaped like a pyramid to show how the energy flows through a food chain, how the amount of energy is decreasing and becoming less available for organisms as it enters each trophic level, and how much of the energy in the ecosystem is lost to the atmosphere as heat.
</span>