The correct answer is an apocrine gland.
The apocrine gland is a type of exocrine glands with a specific kind of secretion by membrane budding. The apical portion of the secretory cell of the apocrine gland pinches off, enters the lumen and loses part of its cytoplasm. The example of the apocrine gland is the sweat gland.
D becausw commenlism is when one animal benefets when the other is uneffected
Answer:
Vitamin A
Explanation:
Vitamin helps corrects deficiency and improve night blindness.
Codon on mRNA, I’m pretty sure because I learned this last year
Answer:
- New seedlings: histone acetylation
- After cold exposure: histone methylation
Explanation:
Vernalization is an adaptive mechanism whose objective is to ensure that flowering occurs only after winter (i.e., after cold conditions). In certain plants, this process (vernalization) suppresses the expression of genes that encode repressors of flowering. In <em>Arabidopsis</em>, vernalization is associated with histone modifications at <em>FLC</em> chromatin. The <em>FLOWERING LOCUS C </em>(<em>FLC</em>) is a MADS-box gene that acts as a repressor of flowering in <em>Arabidopsis</em>. Epigenetic modifications control the expression of the <em>FLC</em> gene. The <em>FLC</em> gene is expressed at low temperatures due to histone acetylation at <em>FLC</em> chromatin, and thereby the expression of <em>FLC</em> mRNA transcripts ensures that the <em>Arabidopsis</em> plant cannot flower. Subsequently, as the <em>Arabidopsis</em> plant is exposed to cold, <em>FLC</em> is repressed by the accumulation of trimethylation on lysine 27 of histone 3 (H3K27me3), thereby allowing it to flower when temperatures become warmer.
