Scientists use the light year because nothing can travel fast than light. Therefore, in any given time frame, light will travel farther than any other substance or particle in the universe. For more precise measurements, scientists use astronomical units. One AU is equal to the distance between the earth and the sun. For anything less, scientists usually use kilometers. For extremely large, interstellar distances, light years are very useful. You wouldn’t want to measure the distance between Earth and Proxima Centauri in kilometers or even AU. The lightyear gives a simple, relative measurement.
To exist we must carry on metablolic processes at all times to ensure the proper function of all our cells, tissues, organs, and systems.
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Parenchyma cells
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- <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.
Lipids of biomolecules hypothesize are present in the unknown sample.Lipids that contain for testing then it will react to the added chemical by changing colors.
The bio-molecules which included carbohydrates, lipids, protein and nucleic acids. All these are used by cells and often obtained through foods we eat.The presence of proteins may be determined by mixing solution with biuret test solution /reagents.
Test solution is mixture of copper ion (Cu2+) and sodium hydroxide (NaOH). It is an organic molecule that includes carbohydrate , protein and nucleic acids. Important for the survival of living cells. Protein is the primary building materials of the human body like skin, hairs, muscles and organs are all composed of proteins.
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How does biology change the way we think about life? - If plants didn’t produce their own food, you wouldn’t have anything to eat. So the next time you sit down to eat, you can thank the process of photosynthesis for your food.
Why is agriculture equally important to the other sciences? - Early farmers improved their crop production by inventing the first gardening tools. Today, farmers improve crop production through the use of Global Positioning Systems aka GPS. Agriculture is just as important, we need all of the new and old sciences.
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