The secondary xylem is produced by the cambium. It is placed between the cambium and the medulla. Option B is correct. Secondary xylem.
<h3>What is the secondary xylem?</h3>
The secondary xylem is the tissue that proceeds from the vascular cambium activity.
Its cells are orientated in different ways composing the vertical/axial system and the horizontal/transversal system.
The secondary xylem is essential to the tree growth in high because of its resistance and the capacity to transport water long distances.
Secondary xylem functions are to transport water and minerals through its vessels and tracheids, to provide support and resistance to the plant, and to store reserve substances.
In the cross-section of the adult tree trunk,
- The outermost layer that interacts with the environment is called periderm (Brown Layer).
- The second layer that follows the periderm is the phloem (Layer C).
- The next layer is the cambium (lateral meristem), which produces phloem cells and xylem cells (Layer B).
- The secondary xylem follows the vascular cambium (Layer A), and
- The medulla is located in the centre of the trunk.
Letter A indicates the <u>secondary xylem</u>.
You will learn more about the secondary xylem at
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Osmosis means the net movement of water molecules from a region of higher water potential to a region of lower water potential, through a partially permeable membrane.
Osmosis is different to diffusion as osmosis is only about the movement of water molecules, while diffusion can be the movement of any dissolved substances. Including gas or liquid.
If a transport requires atp, a type of energy, its active transport. Only active transport requires extra energy.
Another example of active transport includes the absorption of nutrients in small intestine.
Answer:
Pax6 is an evolutionarily conserved transcription factor that activates genes involved in eye development in several animal groups ranging from vertebrates to invertebrates
Explanation:
The Paired box 6 (Pax6) gene is a conserved transcriptional factor involved in regulating eye development across bilaterian species. This homeotic master gene may also play different functional roles in different animal groups. For example, in vertebrates, Pax6 is also required for the formation of the central nervous system (CNS) and pancreas. In invertebrates, Pax6 homologs are responsible for the development of nonocular head structures. In <em>Drosophila</em>, there are two homologs of the Pax6 gene, eyeless (ey) and twin of eyeless (toy), which are involved in eye specification and cell proliferation, respectively.
Actually the answer is natural process.
A habitat is the area where a plant or animal naturally lives and grows. You could think of habitat as the special place in a community in which a plant or animal lives. An ecosystem is a community of living and non-living things that work together. An ecosystem is basically the "neighborhood" where animal lives
