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Eduardwww [97]
3 years ago
15

What is the approximate minimum stream velocity needed to keep a 6.4 cm diameter particle in motion?

Biology
1 answer:
Rashid [163]3 years ago
4 0
A minimum stream velocity <span>needed to keep a 6.4 cm diameter particle in motion must be 100 cm/s.

It can be concluded from Hjulstrome curve, a graph used to determine whether stream will transport, erode or deposit particles. The faster is the current, the heavier particles it could transport.</span>
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3 years ago
Which criteria allow biologists to divide chemicals into macronutrients and micronutrients?
lara31 [8.8K]

Answer:

The requirement of different nutrients, divide them into 2 categories.

Explanation:

On the basis of requirement of nutrients in our food, the chemicals are divided into 2 types - macronutrients, and macronutrients.

Nutrients are the molecules present in the food nourishes the living organisms. The macronutrients are needed in large quantities and they provide energy to the organism.

There are 3 major macronutrients present in every kind of food - proteins, fats, and carbohydrates.  

On the other hand, micronutrients are required very less amount to the animals. But they are important for nourishment of the body, but their quantity is very less. Example of micronutrients are vitamins, minerals, manganese, iron, potassium, etc.

Therefore, it is told one should take balance diet to get all the nutrients.

7 0
4 years ago
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Leya [2.2K]

Answer:

When homologous chromosomes form pairs during prophase I of meiosis I, crossing-over can occur. Crossing-over is the exchange of genetic material between homologous chromosomes. It results in new combinations of genes on each chromosome. ... It is obviously another source of genetic variation in offspring.

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