<h3><u>Answer;</u></h3>
Parenchyma cells
<h3><u>Explanation;</u></h3>
- <em><u>The pith is a part of the Ground tissue together with the cortex. The cortex is located to the outside and/or around the vascular bundles, while the pith is locate in the center of the stem. </u></em>
- Both the cortex and pith are composed mainly of parenchyma cells. On the other hand collenchyma cells give support to the stem and may occur under the epidermis in the cortex.
- Pith is composed of soft, spongy parenchyma cells, which store and transport nutrients throughout the plant.
Question: <em>What is the life cycle of a common frog?</em>
Answer: A frog's life cycle follows along the path of egg, larva, and adult. To be more specific at what each stage is, the frog begins as an egg, laid in water by it's mother to keep the inside cool and hydrated. When it hatches after around fifteen days, it becomes a tadpole. It stays in the water continuing to grow, feeding on whatever lives down in that area. The frog must quickly understand that it is survival of the fittest as their mother doesn't stick around to feed them. After a good few weeks of them shedding their tail and growing working legs, the tadpole becomes a froglet. This stage of life allows them to become land animal; it will soon begin to transform into a frog. Once it does, it's finally off into the land of freedom, but a cruel one at that.
Uplifting Note: At least you're not an ant!
The answer is enzyme linked immunosorbent assay or as called as ELISA is a fast immunochemical examination that comprises enzyme for evaluating an extensive variation of examinations of body fluids. Enzyme linked immunosorbent assay tests spot constituents that have antigenic possessions which mainly proteins reasonably than small molecules and ions such as glucose and potassium.
One way is that it add water to the atmosphere. Another way is that the trees and leafs provides the oxygen
Population Growth - Basic Information
All populations change in size with time
- if births exceed deaths, the population grows
- if deaths exceed births, the population shrinks
- only when births equal deaths does the population stay the same
Other Population Growth Factors
Populations can also change size if organisms move in (immigration) or leave (emigration)
Putting It All Together
We can write a simple equation to show population growth as:
Change in Population Size = (Births + Immigration) - (Deaths + Emigration)
Expressing Population Changes as a Percentage
Suppose we had a population of 100,000 individuals. Suppose in one year there were 1000 births, and 500 deaths.
What percentage of the population were births?
1000/100,000 = 0.01, or in percentage terms, this is 1% of the population.
What percentage of the population were deaths?
500/100,000 = 0.005, or in percentage terms, this is 0.5% of the population.
Assume immigration equals emigration. If so, then they cancel out of our population equation. We'll come back to
this assumption later.
Now, subtract deaths from births but express as a percentage:
1000-500/100,000 = 500/100,000 = 0.005, or 0.5% net growth
Thus, this population would be growing by 0.5% this first year. That means that after one year, there will be 500 more
individuals than the previous year. So, after one year, the population would be 100,500 individuals.
The Net Reproductive Rate
The net reproductive rate (r) is the percentage growth after accounting for births and deaths. In the example above, the population reproductive rate is 0.5%/yr.
Net reproductive rate (r) is calculated as: r = (births-deaths)/population size or to get in percentage terms, just multiply by 100.
Suppose we came back many years later, the net reproductive rate was still the same, but now the population had grown to 1,000,000. How many new individuals would be added each year now? Simply multiply the population by the reproductive rate:
1,000,000 x 0.05 (which is 0.5%) = 50,000
This means that now 50,000 new individuals are added in one year!! The net reproductive rate is the same as before, but because
the population is so much bigger, many more individuals are added.
Exponential Growth
If a population grows by a constant percentage per year, this eventually adds up to what we call exponential growth. In other words, the larger the population grows, the faster it grows!! A curve of exponential growth is an upward sweeping growth curve.
