Answer:
1. 50% of the genome comes from each parent because it is crucial otherwise if the ratio changes, the zygote may not form and if formed the fetus may have some other kind of chromosome number related syndromes etc.
2. Sexual reproduction produces greater genetic variability than asexual methods. This is because of the process of crossing over during meiosis that exchange the segments of chromosome that is necessary for producing mutations and genetic variability.
3. 50% of chromosomes match with each parent because both of the parents contributed 23 chromosomes and exactly 50% of their genome.
4. The gametes must be produced by two different individuals cause that is the main purpose of sexual reproduction and give better survival like this to the forming next generation. Not to mention produces greater genetic variability among species.
5. Plants always produces both eggs because they are hermaphroditic in nature.
I believe the answer is B. <span>The antibodies on B cells bind to the antigens on the pathogen's surface.
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Fungi is a parasitise insect, can be extremely useful for controlling insect pests of corps. fungi can devastate potato corps that have been used to control colorado potato beetles. fungi also could control spittlebug, leaf hoppers and citrus rustmites. this the generally method that fungi contribution to make their environment.
hope this help
