Answer:
the answer is c
Explanation:
because study island said so lol
Answer:
4
Explanation:
Carbon has four valence electrons, so it can achieve a full outer energy level by forming four covalent bonds. When it bonds only with hydrogen, it forms compounds called hydrocarbons. Carbon can form single, double, or triple covalent bonds with other carbon atoms.
The right option is b. growth of
the breasts at puberty
Estrogen is a sex hormone and it is one of the most important hormones for women, together with progesterone. During
puberty, estrogen hormones are released in line with each monthly menstrual
cycle by the ovaries and it helps in the development and maintenance of
female characteristics in the human body such as breasts, pubic and armpit hair. Estrogen also regulate the menstrual cycle and reproductive system of women.
Those cells are called neurons
Answer:
The fragment and plasmid are both cut with the same restriction enzyme.
Explanation:
To insert a piece of DNA in a bacterial plasmid, we need to cut both plasmid and DNA insert from same regions. This is typically done by restriction enzymes or restriction endonuclease. This cutting will open the plasmid (which is circular initially) and produce <u>sticky ends.</u> Here, DNA insert can attach because of similar sequence (see attached figure). In the final step, DNA ligase will glue it in the plasmid and it will become its part. This technique has been extensively used as a DNA recombinant technology. A better representation can be seen in the attached figure where both DNA sequence of interest and plasmid are cut with the same restriction enzyme (shown as scissors) and then ligated with DNA ligase.