Mitochondria, nucleus, chromosomes, ribosomes
Nucleus - spherical body containing many organelles, including the nucleolus. The nucleus controls many of the functions of the cell (by controlling protein synthesis) and contains DNA (in chromosomes). The nucleus is surrounded by the nuclear membrane.
Ans.
Meiosis involves a type of cell division in sexually reproducing organisms that results in formation of four daughter cells from a single parent cell, having half of the genetic material as in parent cell. Meiosis is divided into meiosis I and meiosis II.
In gamete forming cells of humans are diploid cells and have 23 pairs of chromosomes (or 46 chromosomes). Each gamete forming mother cell undergoes meiotic division to form haploid daughter cells or gametes, each with 23 chromosomes.
Thus, the correct answer is 'twenty-three' as there are 23 chromosomes present in human sex cells at the end of meiosis II.
Answer:
- Label A - G1 phase
- Label B - S phase
- Label C
- G2 phase
- Label D - Mitosis
- Label E - interphase
Explanation:
Label A - G1 phase (First gap phase): during this phase, cell grows, forms more protein, RNA and copies cell organelles.
Label B- S phase (Synthesis phase): during this phase, synthesis of DNA and its replication occurs.
Label C- G2 phase (Second Gap phase): during this phase the cell grows more, makes protein and cell organelles.
Label D – Mitosis: during mitosis the cell divides its nucleus and cytoplasm to produce two daughter cells.
Label E- Interphase : A stage of cell growth and metabolic activity. The G1,S and G2 phases together called interphase.
Inter specific competition occurs when two individuals compete for the same resources. Therefore the correct example would be the squash outgrowing the lettuce.
