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denis-greek [22]
3 years ago
12

An _____ is used to measure amounts of isotopes in samples.

Biology
1 answer:
murzikaleks [220]3 years ago
7 0
An mass spectrometer is use to measure amounts of isotopes insample
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Desacribe an experiment to prove that carbon dioxide is essential for photosynthesis ?
disa [49]
Take two healthy potted plants. Keep them in a dark room for 2-3 days. Now place each plant in a separate glass. Get a cup containing potassium hydroxide by the side of the plants (the potassium hydroxide is used to absorb carbon dioxide). COver both plants with separate jars. Seal the jars so that the set-up-is-air-tight. Keep the plants in sunlight for two hours. Gently pluck a leaf from each plant. remove the chlorophyll from the leaves by boiling them in alcohol. Wash the leaves with water and then pour iodine solution over them.

We can conclude that the photosynthesis cannot be carried out without carbon dioxide. the leaf from the plant (which was the jar containing potassium hydroxide, which absorbed the carbon dioxide) turns blue black on iodine solution showing that starch is presented in this lead.

so this shows that carbon dioxide is necessary for the processs of photosynthesis to take place
4 0
3 years ago
The continuous, low-level extinction of species that has occurred throughout the history of life on Earth is known as:
balu736 [363]

Answer:

Background extinction

Explanation:

The background extinction refers to the diminishing of the species at a fairly slow and constant rate. This extinction takes place because of the various environmental factors namely the changing climatic conditions, spreading of diseases, and destruction of habitat. It plays an important role in the natural process of evolution. This has been taking place continuously throughout the geological time and the species are undergoing continuous evolution over a specific period of time.

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Is carbon dioxide an atom, element, molecule, or a compound?
LenKa [72]
Carbon dioxide is a compound.
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