Answer:
It distributes food and water throughout the whole body
Explanation:
Vascular Tissue is the circular system of plants. It distributes water and food throughout the plant and removes waste through the roots and stomata. The vascular tissue is composed of two transport systems: xylem and phloem
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.
Answer:
D
Explanation:
Osmosis is a biological phenomenon whereby the molecules of a solvent moves through a selective permeable membrane from an area of low solute concentration to an area of high solute concentration.
There are three types of osmotic solutions viz;
Isotonic; which has an equal solute concentration
Hypotonic; which has a lower solute concentration
Hypertonic; which has a higher solute concentration
When a living cell is placed in a solution, the solvent molecule (which is usually water) moves in or out of the cell depending on whether the cell has a higher solute concentration (hypertonic) or lower solute concentration (hypotonic) in comparison with the solution it was immersed in.
A good example can be observed in the absorption of water by the root hairs of plants; root hairs, due to the accumulation of minerals, possess a lesser concentration of water molecules than the soil i.e the root hairs are hypertonic. Due to this osmotic gradient, water (solvent) moves from the SOIL, which has a lower concentration of solute, to the ROOT, which has a higher concentration of solute.
