Which one is it? The correct number of chromosomes is maintained during fertilization in sexual
reproduction by -
A - mitosis, which maintains the number of chromosomes in the daughter cells
B- half of the chromosomes being destroyed immediately after fertilization of the gametes.
C - meiosis, which reduces the chromosome number of the gamete by one half
D - chromosomes being copied immediately after fertilization of the gametes.

D.

Explanation:

In humans when the haploid sperm and egg cell join in fertilisation the resulting zygote has a total of 46 chromosomes the correct number to develop. By having gametes which are haploid, when the gametes combine, diploid cells are maintained.

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.

b. climate change will cause an increase in biodiversity of all ecosystems.

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