Answer:
D. Plasmids are nucleic acids which can pass on traits
Explanation:
A Nucleic acid is one of the four biomolecule polymers in living systems. It is made up of monomeric units called Nucleotides. RNA and DNA are the two nucleic acids in existence and they function in storage and expression of genetic information.
According to the question, a colony of bacteria that can break plastics were mixed with the colony that can't break plastics. The two different colonies engage plamids, which conferred the ability to break plastics to some of the colonies that previously couldn't. This tells us that the ability to break plastics in the certain bacteria colony is GENETIC.
If the trait is genetic, the plasmid must be a nucleic acid because of the ability to genetically pass on traits. Note that, a plasmid is an extra-chromosomal DNA (nucleic acid) capable of replicating on its own. Hence, plasmids are nucleic acids which can pass on traits.
<span>The correct option from the given options is: "Scientist have determined the composition of Earth's core by using radiometric dating to examine meteorites".
</span><span>To date materials the procedure of radiometric dating or
radioactive dating is used, for example, rocks or carbon, in which trace
radioactive impurities were specifically fused when they were framed. The
strategy looks at the abundance of a normally happening radioactive isotope
inside the material to the abundance of its decay items, which shape at a known
consistent rate of decay.</span>
<h3><u>Answer;
</u></h3>
<em><u>-Joint capsule
</u></em>
<em><u>-Synovial cavity
</u></em>
A synovial joint is surrounded by a two layer<em><u> joint capsule</u></em> which encloses a fluid filled space called the <em><u>synovial cavity.
</u></em>
<h3><u>Explanation;
</u></h3>
- <em><u>Synovial joint is a type of a joint that joins bone with fibrous joint capsule which is continuous with periosteum of the bones that have been joined. </u></em>
- <em><u>Joint capsule is an envelope that encloses the synovial joint and is also known as the articular capsule</u></em>.
- Joint capsule comprises of an outer fibrous layer membrane and the inner synovial layer membrane.
<h3><u>Answer;
</u></h3>
Dense connective tissue
The outer layer of this structure consists of <em><u>dense connective tissue</u></em> which is continuous with the periosteum of each bone
<h3><u>Explanation;
</u></h3>
- <em><u>The outer layer of the joint capsule is a fibrous membrane that is attached to the circumference of the articular end of each bone on the joint, therefore it surrounds the articulation. </u></em>
- This layer is made up of dense connective tissue which is irregular that is continuous with the periosteum of each bone in the joint. The tissue is a long spongy tissue
<h3><u>Answer;
</u></h3>
Ligaments
The outer layer may be reinforced by<em><u> ligaments </u></em>which are bundles of collagenous fibers. Some of these bundles are part of the capsule while other are located outside of the capsule.
<h3><u>Explanation;
</u></h3>
- <em><u>Ligaments are fibrous connective tissues that help in the articulation of bones to other bones. Ligaments are bundles of collagenous fibers which appear as a crisscross bands which attach bone to bone and help in the stabilization of joints.
</u></em>
- <u><em>Ligaments surrounds a joint to give it support and also limits the movement of these joints. </em></u>Therefore when ligaments are damaged, the joints involved becomes unstable.
<h3><u>Answer;
</u></h3>
Accessory structure
By definition, the structures, such as some ligaments, that are located outside the capsule are called<em><u> accessory structures.
</u></em>
<h3><u>Explanation;
</u></h3>
- <em><u>The synovial joint such as the knee joint contains a synovial cavity and dense, irregular connective tissue which makes the joint capsule normally associated with accessory ligaments</u></em>. These structures are called the accessory structures of the synovial joints.
- <em><u>The accessory structures are the pieces that help to strengthen and connect the joint. </u></em>They include the fibrocartilage, fat pads, tendons, Accessory, Extracapsular, intracapsular ligaments and the bursae.
<h3><u>Answer;
</u></h3>
Synovial membrane
The inner layer of the joint capsule is <em><u>the synovial membrane,</u></em> consisting of loose connective tissue.
<h3><u>Explanation;
</u></h3>
- <em><u>Synovial membrane is a connective tissue which lines the inner surface of the joint capsules in a synovial joint and the tendon sheath. </u></em>It may be described as a layer that lines the cavities of synovial joints bursae and the tendon sheaths.
- <u><em>The membrane functions to secrete the synovial fluid which lubricates the articulating joints.</em></u>
<h3><u>Answer;
</u></h3>
Synovial fluid
The inner lining of the joint capsule secretes a fluid called <em><u>synovial fluid. </u></em>This fluid is viscous, and moistens and lubricates the surfaces within the joint capsule
<h3><u>Explanation;
</u></h3>
- <em><u>Synovial fluid is a special type of viscous fluid that is secreted by the synovial membrane in a synovial joint such as knee joint whose function is primarily lubrication of the joint.
</u></em>
- <em><u>The fluid contains special contents such as hyaluronan, lubricin and the interstitial fluid </u></em>which help in the reduction of friction between the articular cartilage of synovial joints when the joints are moving.
Answer:
It means that species are selective when they are on copulation, and try to mix their genes with other individuals of its own population.
Yes, there are some exceptions like when there is not a lot of population and the individuals have to copulate with very close gene individuals to keep the species alive.
Explanation:
Gene flow has 2 important complex states and are: inbreeding and exogamy.
in Inbreeding, very close individuals from an species (Brother and sister, mother and son, father and daughter etc.) coopulate and generate new individuals, this copulation is something that doesn't help the species because stimulates recessive genes, and makes the population more susceptible to diseases.
In exogamy it's the contrary, mix genes from two individuals who are really different genitecally causes that the individuals have no common characteristics and they are more susceptible to the environment.
