This statement is true. Cells are able to regulate what they do or do
not need in order to maintain their own health - this is done through
the particular things that are filtered or not filtered through the cell
membrane.
Answer: Seed dispersal is the development, spread or transport of seeds from the parent plant. Plants have restricted versatility and depend upon an assortment of dispersal vectors to move their propagules, including both abiotic vectors like the breeze and living (biotic) vectors like birds.
Answer:
50 visible chromosomes and replicated.
Explanation:
- Diploid number 50
- Haploid number 25
When we talk about the cell cycle, we refer to the interphase and the cell division (mitosis or meiosis).
Interphase is composed of stages G1, S, and G2. During the S stage, the DNI replication process occurs. This is the only stage in which the DNI molecule replicates. The synthesis of histones and other associated proteins also occurs.
Meiosis occurs after the interphase is over.
Meiosis produces four daughter haploid cells (n) from a diploid germ cell (2n). Each daughter cell is haploid because they have half the number of chromosomes of the original one.
At the beginning of prophase 1, DNI is condensed in a well-defined chromosome formed by two sister chromatids joined by a centromere. Each chromosome carefully pairs with its homologous chromosome. Homologous chromosomes aline together to make the crossing-over possible, the stage where they interchange their parts.
The whole set of chromosomes is present in prophase 1. The reduction occurs later.
So if the germ cell has 50 chromosomes, the same 50 will be visible during prophase 1. DNA has already been replicated during the S stage of interphase.
Answer:
hi
Explanation:
The lens is a material made of glass or plastic bounded by two surfaces. ... A mirror is a reflector that is shiny from one side and reflects the light rays coming from the object to make it appear as an image to the other side. The lens is of two types viz: Concave lens and convex lens.
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