Osteoblasts form bone. Osteoclasts reabsorb bone.
The correct order of expression of the genes listed below in the determination of segmentation in Drosophila is "Hox genes > Gap genes > Pair rule genes > Segment polarity genes"
<u>Order: </u>2 > 3 > 4 > 1
<u>Explanation:</u>
The master regulator genes are that guide the creation of specific body segments or structures known as "Homeotic genes". Since these genes are active in segment patterning, the gap genes, pair-rule genes and segment polarity genes are designated as segmentation genes.
- Many animal homotic genes express transcription factor proteins that include a region called the homeodomain or Hox gene.
- The maternal impact genes express transcription factors which regulate the gap gene expression. The distance genes subdivide the embryo approximately along the anterior / posterior axis.
- The gap genes encode transcription factors which control the pair-rule expression of genes. The pair-regulated genes split the embryo into segment pairs.
- The pair-rule genes encode transcription factors which control the function of the polarity genes in the segment. The polarity genes in the segment determined each segment's anterior or posterior axis.
According to the medical community, females should visit a gynecologist (the doctor specialized to the female reproductive system) when they enter puberty, that is between the age of 13 and 15. However, some doctors suggest having the first reproductive system check-up when the female becomes sexually active. This check-up should be performed every year, in order to ensure that the female reproductive system is functioning properly.
Answer:
high pressure
<em>I </em><em>think</em><em> it</em><em> is</em><em> </em><em>option</em><em> </em><em>C </em>
<em>hope</em><em> it</em><em> helps</em>
The correct answer is (B) Plants wouldn't be able to draw water from the ground through their roots.
Surface tension is the result of cohesion in water molecules. This cohesion is because of the pressence of hydrogen bonds which makes the water molecules attached to each other. This property is helpful for plants to uptake water from the grounds through their roots. As gravity acts on water, and surface tension will be weak the plants would not be able to uptake water.