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krok68 [10]
3 years ago
15

I will give brainliest for the first person who gets it correct

Biology
1 answer:
Lelu [443]3 years ago
8 0

Answer:

A

Explanation:

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Which one of the following hormones stimulates stem elongation and pollen tube growth? A. auxin (IAA. B. ethylene C. gibberellin
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Hormones stimulates stem elongation and pollen tube growth gibberellins.

A type of plant and fungus hormone is gibberellin. Although its function in the development of fungi is not fully understood, extensive research has been done on it in plants. The other four major groups of plant hormones are auxins, cytokinins, ethylene, and abscisic acid. Gibberellin is one of these hormones. Gibberellin can make seeds come out of dormancy, lengthen cells, promote division, and even play hormonal and signaling roles in the fruiting and senescence processes. Numerous areas of the plant produce different types of gibberellin molecules. There are currently more than 100 distinct gibberellin molecules.

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5 0
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Atoms combine when ____.​
Radda [10]

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Atoms combine when their electrons are shared or transferred

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3 years ago
What type of mutation causes a change in the number of chromosomes?
ycow [4]

Chromosome mutations can result in changes in the number of chromosomes in a  cell  or changes in the structure of a chromosome. Unlike a  gene mutation  which alters a single gene or larger segment of  DNA  on a chromosome, chromosome mutations change and impact the entire chromosome. Key Takeaways: Chromosome Mutations

8 0
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Approximately how long ago did our current era begin ? O A. 1 million years OB. 4.5 billion years C. 65 million yearsO O 100, 00
drek231 [11]

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C. 65 million years ago

Explanation:

The current locations of the continents and their modern day inhabitants, including humans, can be traced to this period.

Pls vote brainliest :)

7 0
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