Answer:
How Does the Immune System Work?
Innate immunity: Everyone is born with innate (or natural) immunity, a type of general protection. ...
Adaptive immunity: Adaptive (or active) immunity develops throughout our lives. ...
Passive immunity: Passive immunity is "borrowed" from another source and it lasts for a short time.
Answer: Carnivores have unique characteristics of their jaw articulation, or the joint between their upper and lower jaws, which enable them to more.
Answer:
increases in crop productivity brought about by genetic engineering can help relieve problems faced by farmers by decreasing the losses caused by pests, disease, weeds,
Explanation:
Answer:
Genetic engineering is the process of altering or modifying the DNA in an organism’s genome.
Yes. During meiosis Diploid (2n) mother cell produces fou haploid(n) daughter cell.
Explanation:
- Meiosis is also known as Reduction division.
- It is type of cell division by which a diploid mother cell produces haploid daughter cell.
- It is termed as reduction division because the number of chromosomes are reduced to half in daughter cell.
- Meiosis occurs only in sex cells to produce gametes.
- Significance of meiosis lie in the fact that it reduces the number of chromosome into half and thus helps to maintain the chromosomal number of the species in the zygote after fertilisation .
- Meiosis has two steps : Meiosis I and Meiosis II. There is a time gap between two steps, called interkinesis.
- Meiosis I involves replication , crossing over etc.
- Meiosis II is similar to mitosis however, no DNA replication occurs prior to meiosis II and the DNA content is thus halved in Daughter cell.
