Answer:
C) They have similar antibiotic sensitivities to those of bacteria.
Explanation:
- Ribosomes are the site for biological protein synthesis that is composed of macromolecular machine for protein synthesis.
- In archaea they ribosomes comprise of three RNA molecules - 16S, 23S, and 5S.
- The archaeal ribosome is a 70S ribosome that is composed of 50S and 30 S subunits.
- The ribosomal binding site of archaeol ribosome may be similar to that of the bacteria, i.e. the Shine- Dalgarno sequence.
- <em>However, the antibiotic sensitivity of the archaeal ribosome is different than those of bacteria as the r-protein sequence of the archaea are closer to that of eukaryote than the bacteria. </em>
The right option is inducible
defense
Inducible defense is a defense mechanism
activated by plants against herbivore attacks.This mechanism is activated through
a prior encounter with a consumer that confer some level of resistance to
subsequent attacks. For the question given above, production of chemical defenses by an algae after it has been grazed upon by a
herbivore is an example of inducible
defense.
During fertilization, the pituitary gland secretes the follicle-stimulating hormone, which acts on the follicles and stimulates them to produce progesterone. The correct option is B.
<h3>What is fertilization?</h3>
Fertilization is defined as the union of two haploid gametes, the spermatozoa and the oocyte, also known as the egg, to restore the diploid state, form a zygote through the process of egg activation, and initiate a series of mitotic divisions that result in cell differentiation and embryo development.
During fertilization, the pituitary gland secretes the follicle-stimulating hormone, which acts on the follicles and stimulates them to produce progesterone.
If fertilization occurs, the fertilized egg attaches to the uterine lining and a placenta develops.
The fertilized egg then sends a signal to the ovary to continue secreting progesterone, which keeps the pregnancy going by keeping the uterus lining thick and nourishing for the developing embryo.
Thus, the correct option is B.
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Answer:
It's A, a security guard
Explanation:
The cell membrane is like a security guard because it controls what goes in and out of the cell.
True, the most common chronic diseases involve the heart.