Please help!

Biology

2 answers:

Oduvanchick [21]3 years ago

7 0

C is the correct answer
water cycle will renew water

Ivenika [448]3 years ago

6 0

Answer: C) The water cycle

Explanation:

Freshwater is a naturally occurring source of water. It exhibit very low salt concentration. It includes water of ice sheets, glaciers, rivers, bogs, lakes and underground water source called as groundwater. The freshwater is required for the survival of living organisms on earth. The freshwater is a renewable resource because it can be replenished after use by the water cycle. The water cycle involves the evaporation of water from the freshwater sources or other water sources, formation of water vapors in the atmosphere, condensation, and precipitation of water in the form of rain or snow. By this way the freshwater renews in nature in the form of precipitation by water cycle.

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Read 2 more answers

In a single organism, what do you notice about the relative proportions of DNA bases?

Snezhnost [94]

Answer:

A and T occur in similar proportions.

G and C occur in similar proportions.

Explanation:

There are four nitrogenous bases that form integral part of DNA, these are Adenine (A), Guanine (G), Thymine (T) and Cytosine (C). Due to specific base pairing between these bases, (Adenine is always linked to Thymine through two double bonds and Cytosine is always linked to Guanine through three double bonds), it is estimated that A and T occur in similar proportions. while G and C occur in similar proportions. <em>This was proposed by Chargiff for the first time and now it is considered to be as Chargiff rule. </em>You can see chart in attached image to know that how equal the ratios are found experimentally in different living organisms.

Hope it helped!