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Vaselesa [24]
3 years ago
15

Parents can pass on chromosomes to their children that are different than their own when the new gene combinations are created b

y
Biology
1 answer:
Margarita [4]3 years ago
5 0

D)crossing over of homologous chromosomes during meiosis.
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How would the contractile vacuole of a freshwater amoeba respond if the organism was placed in seawater
Sveta_85 [38]

Answer: Contractile vacuole of amoeba will shrink/contract when the organism is placed in sea water.

Contractile vacuole is a subcellular structure ( mainly found in protists) that is involved in the regulation of water quantity inside a cell.

As we know that water always flow from a hypotonic ( where solute concentration is less) to a hypertonic ( where solute concentration is more) solution. Sea water is a hypertonic solution as the concentration of salt is very high. Therefore, in this case, water will flow from contractile vacuole to outside of the organism.

Thus, contractile vacuole of amoeba will contract as it will lose water when placed in sea water.

8 0
3 years ago
Rosalind Franklin used x-ray diffraction to record how x-rays scatter when bounced off the surface of DNA molecules.
Lady bird [3.3K]

Answer:

e) All of the answers are correct

Explanation:

The first X-ray picture of DNA taken in 1952 by Rosalind Franklin using the  X-ray crystallography technique revealed the helical shape of DNA. Based on this discovery, it was discovered later on that the DNA molecule was made of two chains of nucleotides and at high humidity i.e when exposed to water it becomes long and thin.

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Why is it hard to find animals in tropical areas?
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Answer:

Tropical areas are warm and wet causing for animals to want to hide essentially. Also there is a lot of cover for animals to hide in. Usually in tropical areas there are a lot of predators also, another reason for animals to hide.

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the red blood cells as it contains haemoglobin

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