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Viefleur [7K]
3 years ago
5

1) Which is the variation stage and why?

Biology
2 answers:
spin [16.1K]3 years ago
6 0
Think you forgot to add a picture but a variation stage is a method for dealing with rapidly varying environments without requiring mutation
Romashka-Z-Leto [24]3 years ago
5 0
Did you forgot to add a picture?
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If a disease is sex-linked, what pair of chromosomes must contain the gene responsible for the disease?
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Answer:

23rd Pair

Explanation:

Took bio last year, I know it's right, hope it helped

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In a certain species of plant, the allele to produce green melons (G) is dominant over the allele to produce yellow melons (g).
marishachu [46]

Answer:

4.26

Explanation:

Let the green-melon parents be Gg, then we expect the cross with the yellow-melon plant gg so as to produce 50% Gg and other 50% of gg offspring. What we observed was that 53 green and a 41 yellow. Based on the total number of 94 offspring , we expected half and a half ratios to be 47 of each color.

                                Observed(o)   Expected(e)   (o-e)    $(o-e)^2$      $(o-e)^2/e$

Green-melon plant        53                    47               6          36             0.766

Yellow-melon plant        41                    47              -6          36             0.766

Therefore the chi-square value is 1.53 which is less than the critical value of 3.84. Therefore, the null hypothesis is accepted.

4 0
3 years ago
What is the composition of earths atmosphere
gogolik [260]

The earth's atmosphere consists mainly of nitrogen and oxygen with smaller proportions of other gases such as carbon dioxide. The amount of carbon dioxide in the atmosphere is maintained through a balance between processes such as photosynthesis, respiration and combustion. However this balance is being affected by human activities which are polluting the atmosphere.

The proportion of these gases in the atmosphere is as follows: nitrogen is the most abundant at 78%, oxygen is next at 21%,  while others  include carbon dioxide at 0.037% and argon at 0.9 % .

7 0
4 years ago
The chart shows information about four ecosystems. Ecosystem Data Ecosystem Average Year-Round Temperature (°F) Niche Diversity
slavikrds [6]

Answer:

b.( x )

Explanation:

yw

7 0
3 years ago
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