<h2>
Hey There!</h2><h2>
_____________________________________</h2><h2>
Answer:</h2><h2>_____________________________________</h2>
Class Crustacea belongs to the Phylum Arthropoda. It is a class itself thus it does not have any subphylum.
<h2>_____________________________________ </h2>

Phylums are the groups and Phylum arthropoda is one of the 33 phylas of the Kingdom Animalia. Phylum Arthropoda has the largest phylum of the Animal Kingdom with variety of animals that include one million species. It has 5 classes.
- Class Merostomata
- Class Arachnida
- Class Crustacea
- Class Myriapoda
- Class Insecta
<h2>_____________________________________</h2>

- They are usually aquatic both marine and freshwater.
- Exoskeleton is hard and made up of chitin called carapace.
- Body is divisible into head, thorax and abdomen. Some animals have cephalothorax.
- Cephalothorax regions are formed by the fusion of head and thorax
- Head bears two pairs of antenna, one pair of mandible, two compound eyes with stalk.
- Respiration takes place by gills or through body surface
- Excretion is carried out by one pair of antennary glands or green glands.
- The thorax and abdomenal appendages may be modified for swimming, feeding, walking, resperation as well as reproduction.
- Sexes are separate
- Dimorphism is prominent
- Five walking legs for locomotion are present.
- Example: 1)free living are, Daphnia, Cyclops, Argulus, Sacculina, Prawn Crabs etc.
2)Parasite are, Barnacles and Sacculina.
3) Marine are Shrimps, Lobsters etc.
4) Sedentary crustaceans are Barnacle(Parasite), Prawns(Fresh-water living) etc.
<h2>_____________________________________</h2><h2>Best Regards,</h2><h2>'Borz'</h2><h2 />
The mitochondria because they are the energy-producers for cells
The answer is B. Multi cellular does not describe Dinoflagellates<span />
If a person with blood group type O received blood transfusion from type Ab it will lead to major hemolytic transfusion reaction.
<h3>What is Blood Transfusion?</h3>
Intravenously putting blood components into a person's circulation is known as a blood transfusion. For a number of medical disorders, transfusions are performed to replenish lost blood components. The blood's components, such as red blood cells, white blood cells, plasma, clotting factors, and platelets, are now frequently used in transfusions instead of the whole blood that was used in earlier times.
Hemoglobin is a component of red blood cells (RBC), which carry oxygen to the body's cells. Although they are not frequently utilized in transfusions, white blood cells are an essential component of the immune system and help the body fight illnesses. The "yellowish" liquid component of blood called plasma serves as a lubricant and is made up of essential nutrients and proteins for the body's overall health.
Learn more about Blood with the help of the given link:
brainly.com/question/24389046
#SPJ4