Answer:
the correct answer is 3
Explanation:
Cortisol is a hormone that is considered as an endogenous mineralocorticoid that activates the sympathetic nervous system, it is said that its peak in blood in the body respects a schedule and it is at dawn, which makes us wake up at dawn.
This hormone once it diffuses through the cell membrane has its receptor and its action at the nuclear level, this is thanks to its butterflies properties that helps it to better diffuse the membranes and reach a binding site at the nuclear level. In this way it interferes with genetic coding and protein expression.
Answer:
134
Explanation:
Polar bodies are formed each month after attaining puberty. Hence, total years of polar bodies formation are equal to the difference between the age of puberty till date.
Hence, total years of polar bodies formed = 32-16= 16
Hence, total number of polar bodies formed 16×12= <em>1</em><em>9</em><em>2</em>
<em>For one child absence of polar bodies formation = 15 months, where 9 months of gestation and 6 months of lactation.</em>
<em>So, for </em><em>1</em><em> </em><em>child, it will be 15 x </em><em>1</em><em> </em><em>= </em><em>1</em><em>5</em>
<em>Hence, net polar bodies formed in her body till date - 120 + </em><em>1</em><em> </em><em>- </em><em>1</em><em>5</em><em> = </em><em>1</em><em>3</em><em>4</em>
<em>Hence, net polar bodies formed in her body till date </em><em>1</em><em>3</em><em>4</em>
Answer:
Acetylation of histone tails is a reversible process.
DNA is not transcribed when chromatin is packaged tightly in a condensed form.
Methylation of histone tails in chromatin can promote condensation of chromatin.
Acetylation of histone tails in chromatin allows access to DNA for transcription.
Eukaryotic chromatin structure is a highly complex assembly which needs to be simplified in order to undergo process of transcription. Eukaryotic chromatin structure is highly condensed in nature and DNA cannot be access for transcription. Actylation of histone tails is a process in which breaks the bond of attraction between adjacent nucleosomes. It results in chromatin being condensed attains a loose form. Transcription of DNA can occur in a loose chromatin. Methylation can promote condensation or decondensation of chromatin structure depending upon the methyl group present in the histone.
Answer:
It is possible to determine their functions and to identify the mechanism involved in their mode of inheritance
Explanation:
Matrilineal inheritance refers to the inheritance of genes directly from the mother, it either through the inheritance of mitochondrial DNA or by the epigenetic mechanism of genomic imprinting (in the case above indicated, maternal imprinting). By mutating genes which are inherited from the mother it is possible to study their functions as well as their mode of inheritance. By using a reverse genetics approach, many maternal imprinted genes have recently been identified to be involved in embryo development, especially in model organisms like <em>Drosophila</em>.
Answer:
b hummingbirds have the ability to hover while drinking nectar
Explanation:
because this allows for power in both the upward and downward beats of the hummingbirds wings
