The answer is A. cleavage, differentiation, fertilization, gastralution
Some examples would be
-television
-led lights
- heat and light from the stove
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Answer:
Explanation:
The use of ointment for bacterial treatment does not fall into the first line of defence.
The first line of defence are physical (skin,tears, mucus) and chemical barriers( white blood cells also called neutrophils) which are prepared to defend the body against infection. The skin which is one of the first line of defence is a barrier that prevents entry of microorganisms the body. When the first mechanism is not effective especially for pathogens then the second mechanism is activated to get rid of the microorganism.
The use of ointment does not belong to any barrier or defence mechanism this is because it is not a natural way of getting rid of microorganisms within the body system.
The choice that best describes when a cell becomes 2n is : ( C ) after meiosis when froming a zygote
<h3>Mitosis vs Meiosis </h3>
Mitosis is a single round division of a parent body cell which produces two ( 2 ) identical diploid daughter cells ( 2n cells ). while Meiosis is the divison of parent gametes which produces four ( 4 ) haploid daughter cells. Meiosis leads to the production of gametes.
Hence we can conclude that The choice that best describes when a cell becomes 2n is : after meiosis when froming a zygote
Learn more about Meiosis : brainly.com/question/8253366
DNA strands within each chromosome breaks in the exact same location, leaving two free ends then crosses over into the other chromosome and forms a connection called a chiasma!