<span>Answer:
A. Fluconazole (Diflucan)
• Correct: Fluconazole (Diflucan) is indicated for opportunistic candidiasis infection related to HIV.
• (B) Trimethoprim/sulfamethoxazole (Bactrim) is indicated for bacterial infections such as urinary tract infection.
• (C) Rifampin (Rifadin) is used for treatment of tuberculosis.
• (D) Acyclovir (Zovirax) is an antiviral agent</span>
Answer: Option A
Explanation:
A tunicate is marine invertebrate animal which is a part of chordates. They have notochords and dorsal nerve chord. The subphylum of the organism is called as Urochordata.
The adult urochordates lack notochord but the larval stage of the urochordates have notochord. This is because it helps in swimming of the organism which is required only at the larval stage.
The adult stage of the tunicates is sessile and they do not swim so they do not require notochord.
Answer:
Humans and apes represent divergent lines of evolution from a common ancestor.
Explanation:
That's why we say we are related to chimps or other primates.
Exoskeleton
Exoskeleton is a evolutionary innovation. This is operated by muscles attached to it and acts as an armor. Other than support this is an adaptive mechanism to provide protection against predators. In vertebrates, it is considered as the dermal bone that developed via membranous ossification. Fishes retained their exoskeleton in the form of their scales. However, in some organisms terrestrial evolution allows the loss of exoskeleton and formed a more mobile endoskeleton,
46 Cromosomas
Las células del ser humano tienen 23 pares de cromosomas, 22 pares de autosomas y un par de cromosomas sexuales. Por tanto, cada individuo tiene 46 cromosomas en sus células. Por lo tanto, el número de cromosomas presentes en una célula nerviosa de un ser humano es de 46 cromosomas.
