Answer:
B)
Explanation:
Based on the information provided within the question it can be said that one possible main explanation is that a female zebra finch that chooses a mate that resembles her father is more likely to reproduce successfully.
This is due to the fact that they have seen this ornament as a symbol of the male becoming a father thus being more likely to reproduce successfully.
Answer:
When there is an increase in potassium within the cell, depolarization is generated
Explanation:
Depolarization is the intracellular increase of potassium in the cardiac cell, this is how the resting potential is reached, this state of the cell refers to the fact that the cell does not execute or transmit any signal, it is in a refractory state of signals, since it does not capture any, this is how it prepares and recovers for future action potential.
Organ system/organism should go into organ system and then organism but I don't know what your choices are
Answer:
1- DNA: a specific DNA sequence encodes a transcription factor which activates the expression of target genes involved in cell differentiation
2- RNA: short non-coding RNAs may bind to enhancer regions and thus activate the expression of target genes involved in cell differentiation
3- Environmental factor: temperature may control the expression of genes involved in cell differentiation pathways
Explanation:
The deoxyribonucleic acid (DNA) contains the genetic material required to encode proteins. Some of these proteins are transcription factors involved in the activation of diverse signaling pathways, including, for example, cell differentiation and proliferation. On the other hand, microRNAs (miRNAs) are short non-coding RNAs that have the ability not only to repress but also to activate transcription by binding enhancer sequences. The miRNA activation mechanism has recently been discovered. In consequence, some miRNAs may potentially activate the expression of target genes involved in cell differentiation (e.g., <em>c-myc </em>gene). Finally, environmental factors (e.g., nutrient availability, salinity, temperature, etc.) may also activate gene expression and thus control diverse pathways such as cell differentiation, cell proliferation and cell death (apoptosis).
