Question

1) Which of the following tissue type is incorrectly paired with the germ layer it originates from? A) Ectoderm - skin B) Mesoderm - nervous system C) Endoderm - digestive system D) all pairings are correct 2) Which of the following is a function of a skeletal system? A) body posture B) transfer of forces created by muscles C) physical protection of organs and tissues D) all of the above 3) Suppose a researcher for a pest-control company developed a chemical that inhibited the development of an embryonic mosquito's ectodermal cells. Which of the following would be a likely mechanism by which this pesticide works? A) The mosquito may not be affected at all. B) The mosquito may have trouble with respiration and circulation, due to impaired muscle function. C) The mosquito may develop a weakened exoskeleton that would make it vulnerable to trauma. D) The mosquito may have trouble digesting food, due to impaired gut function. 4) The evolution of the jaw likely began with changes to the A) the collar bone B) first rib bones C) gill arch D) gill flaps 5) True or False: An exoskeleton is on the outside of the musculature. A) True B) False 6) If you know how many tissue layers an organism has in very early embryonic development, you can classify them as A) bilaterally or radially symmetrical B) protostome or deuterostome C) coelomate, pseudocoelomate, or acoelomate D) diploblast or triploblast 7) Which of the following classifications is not correctly matched with its definition? A) ectoparasite - a parasite that attaches to the skin to have a blood meal B) carnivore - a predator that eats other animals C) omnivore- an animal that eats both plants and other animals D) detritivore - an animal that feeds on live animals and plants

Answer 1

Correct answers with explanations are given below :-

+ Ansy ® Mesoderm - Nervous system. explanation 1. ectoderm will twin into skin and central nerrous system cells. The mesoderm foorms mesenchyme, mesothelium, Tubular cells of kidney, Red blood cells, smooth muscle etc. so, Mesoderm - Nervous system is the inca. Pair so. ® is the right answer. 27 Ansy 6 All of the above. explanation main function of skeletal systems are support body postare, movement protection Production of blood cells and storage of minerals. body posture, transfer of forces created by muscles physical Protection of organs and tissues all are correct answers. By Ans ② The mosquito may have trouble with respiration and circulation due to impaired muscle function. explomation Ectodermal cells grow and differentiale to form the epidermis brain and nervous system and respiratory tracheal) system. Respiratory orgon of mosquito is trachea. 4 Ans> © Gill Arch explanation 1. Jaws originated in the pharyngeal arches supporting gills of Jawless fish. Most scientist betine believe that evolved from the first bronho brachial arch . the jows

6) Ans> ④ True explanation An exoskeleton is the stiff covering on the outside of some atures. This exoskeleton protects the insect's internal organs, went it from drying out. It attaches to the insect's muscles. 6) Anss ③ Diploblast or triptoblast explanation when body denired from only two layers (embryonic cell layer) ectoderm and endoderm but no mesoderm known as diploblast, - Body derived from three embryonic cell layer (ectodom, 1. mesoderm and endoderm) known as Triploblast, 7 Ans> ® Detritivare - on animal that feeds on line animals and plants. explanation ③ is not correctly matched because - Defritivores are feeds on dead organic material, especially plant detritus. so, D is the correct answer .