<span>a)
</span>The milkweed is the primary producer in the
ecosystem. It manufactures food from the abiotic factors in the soil such as
nitrates and water and those in the atmosphere such as carbon-dioxide and
sunlight. The milk weed is then fed on by the caterpillar and a primary
consumer. The caterpillar is then fed on the mocking bird (secondary consumer)
<span>b)
</span>Increased human population growth and their activities
have resulted in the emission of carbon dioxide and other greenhouse gases in
the atmosphere. This has increased the global temperature. This increase of
global temperature increase ocean temperatures causing coral bleaching.
Another example is depletion of water sources
by human activities hence causing drought. Drought reduces the amount of
vegetation growth due to scarcity of water in the soil (due to lowering of the
water table) for plant growth.
Gene mutations can best be described as changes in the (3) nucleotide base sequence in DNA.
Answer:
When you spin around rapidly, that liquid in the inner ear spins as well. When you stop spinning the liquid keeps moving for a bit, confusing your brain into thinking that you're still spinning even when you're standing still - and that makes you feel dizzy.
One major factor that is influenced by the shape of the earth and its tilt is temperature. It varies across the earth due to differences in the way the sun rays ‘hit’ different parts of the earth. This causes some regions to be colder and some warmer than others. This, therefore, causes terrestrial organisms in regions to vary due to their adaptation to their respective environments. Warmer regions usually have higher biodiversity than colder regions.