Answer:
A. because immune, nervous, and muscle system cells require proteins for structure and regulation.
Sky is blue everywhere, without clouds of course
Answer:
E. provide foods and antibiotics.
Explanation:
sometimes microorgansims plays important role for human such as;
Bacteria;
- Present in our gut help to digest food and the gut of animal such sa cattle help to digest cellulose.
- Bacteria are used in the production of food products such as yogurt and cheese.
- Help in pest control such as <em>Bacillus thurigiensis.</em>
- Help in the production of certain medicines and supplement such as Insulin
Fungi;
- There are many mushrooms we can eat and fungi are also involved in the production of certain food products such as wine, bread.
- Fungi are involved in production of certain medicines such as penicillin is produced from Penicillium.
Answer:
The description is provided in the explanation section below
Explanation:
ALTERNATION OF GENERATIONS is a unique phenomenon whereby certain organisms switch between a diploid state and a haploid state in their reproductive life cycle. It is a feature of plants (higher and lower).
A plant is a diploid organism (2n) i.e. contains two set of chromosomes. This diploid state of the plant is called the SPOROPHYTE. The diploid sporophyte (2n) of a plant undergoes meiotic division (reduction division) to produce haploid spores. These haploid spores germinates and grows via mitosis (duplication division) to form the haploid GAMETOPHYTE.
The haploid gametophyte (n), via structures called GAMENTAGIA, produces haploid gametes. The male gametophyte produces male gametes (sperm) while the female gametophyte produces female gamete (egg). These haploid gametes eventually fuse in a process called FERTILIZATION to produce a diploid ZYGOTE (2n) i.e. sperm (n) + egg (n) = zygote (2n). The ZYGOTE undergoes series of mitotic divisions (growth) to form the diploid SPOROPHYTE (2n) of the plant. The cycle restarts again in that order, hence it is called ALTERNATION OF GENERATIONS.
N.B: Mitosis maintains the number of chromosomes of the parent cell while meiosis reduces the chromosomal number of the parent cell by half.
