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mestny [16]
3 years ago
13

Explain how the percentages of nitrogen, oxygen and carbon dioxide in the Earth’s atmosphere today have changed from the Earth’s

early atmosphere.
Biology
1 answer:
Degger [83]3 years ago
4 0

Explanation:

The early atmosphere was mainly carbon dioxide and water vapour. Water vapour condensed to form the oceans. Photosynthesis caused the amount of carbon dioxide to decrease and oxygen to increase.

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Which correctly describes crossing over?
tekilochka [14]

is the mixing of chromosomes, which results in the recombination of genes on the same chromosome or that of A diploid cell undergoes meiosis.

7 0
4 years ago
Match the recommended carbohydrate intake for the conditions listed (answer may be used more than once). Intake one hour prior t
liq [111]

Answer:

1. 1 g/kg body weight

2. 5 g/kg body weight

3. 8 g/kg body weight

4. 10 g/kg body weight

Explanation:

Carbohydrates are one of the most important food groups together with lipids and proteins, and they must be consumed to have a healthy diet. Carbohydrates can be classified into three subtypes: monosaccharides (e.g., sugars), disaccharides (e.g., lactose), and polysaccharides (e.g., starches), which are broken down and absorbed as monosaccharides in the small intestine. These different types of carbohydrates are found in fruits (sugars), milk (lactose), and cereal grains (polysaccharides). Carbohydrate intake in the diets ranges from 6 to 10 g/kg bodyweight depending on the gender and the fitness characteristics of the person, as well as his/her daily energy expenditure. It has been proposed that carbohydrate intake should provide 45–65% of daily calories regardless of age or sex of the individual.

6 0
4 years ago
In a species of beetle, individuals that are larger than average are good at catching large prey, while individuals that are sma
viktelen [127]

Answer:

Disruptive selection

Explanation:

Disruptive selection -also called diversifying selection- is a type of natural selection where individuals with the smallest and largest values of the trait are favored while those with intermediate values are at a fitness disadvantage.  This selelction goes  against the average individual in a population.

7 0
4 years ago
What are the differences you can see when you compare the nucleons of a dividing cell with that of a non dividing cell
faltersainse [42]

Answer:

Chromosomes will be seen in the nucleus of dividing cells (during mitotic and meiotic cell divisions) because they are visible when a cell is dividing as oppose to non dividing cells. Also, all processes of cell division from prophase, metaphase, anaphase to telophase will be seen :)

6 0
3 years ago
Can someone please help ASAP!!
victus00 [196]
Yes I can I will get back to you in the comments
8 0
3 years ago
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