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IceJOKER [234]
3 years ago
12

Recent research on biological factors in suicide has linked it to low levels of the neurotransmitter _______ in the brain.

Biology
1 answer:
MAXImum [283]3 years ago
8 0
The answer you are looking for is called Serotonin. Please put this as the brainiest answer thank you and hope this helped.
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As with all multicellular organisms, homeotic genes in plants control morphogenesis (how the tissues and organs of the plant are
joja [24]

Answer:

a. True

b. True

c. False

d. True

e. False

f. False

g. True

Explanation:

The homeotic genes refer to evolutionarily conserved genes that modulate the development of different structures in organisms of the same groups (in this case, plants).  Moreover, homeobox genes are genes that encode transcription factors involved in the regulation of development in eukaryotic organisms. The knotted1 (<em>kn1</em>) gene is a plant homeobox gene is a member of the <em>kn1</em> homeobox (<em>knox</em>) gene family, which is responsible for maintaining indeterminacy and preventing cellular differentiation. In maize, <em>kn1</em> plays a key role in maintaining the cells of the shoot apical meristem in an undifferentiated state, being mainly expressed in shoot meristems during postembryonic stages of shoot development. It has been observed that maize mutant plants where <em>kn1</em> is ectopically expressed (i.e., in tissues in which this gene is not normally expressed) exhibit proximal-distal patterning defects.

5 0
3 years ago
Which of the following changes to Earth is NOT caused by living organisms?
densk [106]

Explanation:

probably A but I'm not sure about it

3 0
1 year ago
The clean water act blank.
sleet_krkn [62]

Answer:

establishes the basic structure for regulating discharges of pollutants into the waters of the United States and regulating quality standards for surface waters.

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All BUT ONE of these scientists worked on the development of the double helix model of DNA. The scientist NOT involved in this r
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C. McClintock is memory serves
3 0
3 years ago
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What happens to the chromosome number during meiosis?
zysi [14]
It splits in half, it was 46 chromosomes but now it 23 chromosome, one from each gamete cell, one from mum and dad, makes up 46 chromosomes.
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