Answer:
b) plasmid
Explanation:
A plasmid is an extrachromosomal DNA molecule that found in a cell that replicates independently without the need for chromosomes. A plasmid is small and is also not attached to the chromosomal DNA. Generally, plasmids are a circular piece of double stranded DNA materials that are present in bacteria.
Plasmids are used in a molecular biology laboratory for gene manipulation. they are able to transfer genes to a DNA through DNA recombinant technology and also aid DNA replication in bacteria. Plasmids are also used to study antibiotic resistance.
Answer: osmosis
Explanation: I learned about it
Answer and Explanation:
The interphase is the previous step before mitosis occurs. The interphase is conformed of the G1, S, and G2 stages.
- During the G1 stage, it occurs a high intense biochemical activity. The cell duplicates its size, and the organelles and other molecules and cytoplasmatic structures duplicate too. Some structures, such as microtubules and actin filaments, are synthesized from zero. The endoplasmic reticulum increases in size and produces a membrane for the Golgi apparatus and vacuoles, lysosomes, and vesicles. During this stage, the pair of centrioles separate, and each centriole duplicates. Mitochondria and chloroplasts also replicate.
The stages S and G2 follow the G1. Once the whole interphase is completed, mitosis occurs.
- During the S stage occurs the DNI replication process. At this point, it also occurs the synthesis of histones and other associated proteins. This is the only stage where the DNI molecule is replicated.
- G2 stage is the final one before the cellular division. Here it begins the slow process of DNI condensation. Duplication of centrioles completes. Structures such as spindle fibers are assembled.
Answer:
The bone that is attached to the eardrum is called the <u>hammer;</u> the bone that is connected to the oval window is called the <u>stirrup.</u>
Explanation:
The vibrations are transmitted to the interior of the ear through the three bones located in the middle ear: hammer, anvil and stirrup. These three bones form a kind of bridge, the hammer is a bone that is connected to the tympanic membrane or eardrum and is responsible for transmitting the sound waves that arrive through the air to the inner ear. The vibrations first reach the anvil through the joint incudomalear and then to the stirrup (stapes), which is the last bone where the sound arrives and that is connected to the oval window (membrane that covers the entrance to the cochlea in the inner ear, when the sound waves are transmitted from the eardrum to the oval window, the middle ear functions as an acoustic transformer).
