<span>Adults in a family control the money, much as the wealthy control capital in the larger economy as a whole. The children are dependent upon them, just as workers are dependent upon capitalists to provide jobs through investment.</span>
Answer:
Option 2: Spiracles.
Explanation:
Cartilaginous fish (also called Chrondricytes) have a skeleton of cartilage, instead of bone. There are two subclasses - Elasmobranchii and Holocephali. Sharks, rays, skates and sawfish are elasmobranchs while chimeras are holocephali.
Here’s a list of features of cartilaginous fish in comparison to bony fish:
1. Cartilage skeleton: unlike bony fish that have a skeleton made of bones (just like other terrestrial vertebrates), the skeleton of cartilaginous fish is made of cartilage.
2. Spiracles: this is a modified gill of sorts, it aids with respiration and is found slightly behind each eye. It leads directly to the mouth. Most cartilaginous fish possess this organ (exceptions are present, such as hammerhead sharks). Bony fish do not possess spiracles.
3. Ampullae of Lorenzini: absent in bony fish, these organs are electroreceptors that form a network of pores filled with a form of jelly that can transmit electrical signals. It allows the cartilaginous fish to sense electric fields in the water (such as the movements of a fish struggling), magnetic fields and temperature. Some bony fish such as sturgeon and lungfish may possess these organs, however research is still ongoing.
4. Claspers: male cartilaginous fish possess an organ known as claspers at their pelvic fin. This is used during reproduction to transfer the sperm into the female for fertilisation. As such, internal fertilisation occurs in cartilagonous fish. Bony fish do not possess this organ, and external fertilisation occurs.
There are many other characteristics that differentiate cartilaginous fish from bony fish. They're an extremely fascinating group of animals that unfortunately, is decreasing in numbers. Very little is known about many of these animals, so it is important that we do our best to conserve the sharks, rays, sawfish and chimeras before we lose them forever.
Answer:the last one
Explanation: red blood cells are round in order to move easily through blood vessels.
1. A person cannot catch disease from pathogens in boiled water.
2. It is not important to be determined of how wealthy the diseased people were.
3. The quickest part for the disease to spread is in a crowded city.
4. The type of disease transmission is person to person.
5. The foodborne illness is an indication of the pattern that all the victims shopped at the same.
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Answer: Important characteristics of antimicrobial drugs include low toxicity for human tissues. High toxicity against microbial cells. Do not cause serious side effects in humans. Stable and soluble in body tissues and fluids. All of the choices are correct.
Explanation: