The skin acts as a barrier for protecting the body from the harmful things such as sun rays, moisture, cold.
<u>Explanation:</u>
Skin plays an important role in regulating body temperature. It helps to prevent harmful substances enter into our body, and does not allow to loss water in our body. Its form the barrier that prevents harmful substances and microorganisms enter in our body.
Our skin is the protecting layers and against loss of water and blood from our body. Its help us to maintain the constant body temperature. The important role of the skin us to protect our body from the ultraviolet rays.
Answer:
Cas9-sgRNA cannot align with targeted DNA sequence
Explanation:
Without a PAM sequence, the CRISPR-sgRNA (small guide RNA) complex cannot align with the targeted DNA sequence. Therefore, you cannot perform experiments (e.g. gene editing) using CRISPR-Cas9.
I'm no good with science sorry
Crossing over does not prevent homologous chromosomes from separating during meiosis, hence, the statement is false.
CROSSING OVER:
- Crossing over is the process whereby non-sister chromatids of homologous chromosomes exchange their genetic materials.
- Crossing over occurs specifically during the prophase I stage of meiosis I. Via this process, genetic diversity is likely to occur in the daughter cells.
- Crossing over only assures that genes of homologous chromosomes are recombined, it does not stop them from separating in the Anaphase stage.
- Therefore, crossing over does not prevent homologous chromosomes from separating during meiosis, hence, the statement is false.
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