Question

If the atrioventricular node could be surgicallyremoved from the heart without disrupting signa 23. transmission to the Purkinje Fibers, what would be the effect? A. No apparent effect in heart activity would be observed B. The heart rate would be decreased C. Only the ventricles would contract. D. Only the atria would contract. Atria and ventricles would contract about the same time. Which of the foliowing is characteristic of ahemation of generasions in land plants? laploid sperophytes make baploid spoees. B) Gametophyies produce spores that develop into gameies C) Sporopkytes and gametophytes are typically similar in apptarance. D) Meiosis in sporophytes produces haploid spores. E) Either the gameiophye or the sporophyse is unicellulan 25. Mos animals exh bit the fellowing structures or functions excqp A) nervous and muscle tissue. B) nique types of incroelular junctions, such as tight junctions and pap junctions. autotrophic nutrition. D) sexual repeoduction E) multicellularity. 26. Which of dhe followieg is an incorrecer association of an animal germ layer wish the tissues or organs to which it pives rise? A) ectoderm-outer covering B) endodenn-intersal lining of digestive tract E) endoderm-internal linings of liver and lungs 27 Both animals and furgi are heterotrophic. What distinguishes animal heterotrophy from fungal heterotrophy is that only animals derive their autrition Aj from organic maner. B) by preying on animals @pby ingesting İL D) by consuming living, rather than dead, prey. E) by sing enzymes to digest their food 28 Which of the following functions is an advantage of a fluid-filled body cavity? A) Internal organs are cushioned and prolected from injury B) Organs can grow and move independently of the outer body wall C) The cavity acts as a hydrastatic skeleton. D) A and Conly A,B,and C

Answer 1

23.

E. Atria and ventricle would contract about the same time.

• It contracts because of the presence of SA node.
• It transmit signal through purkinje fibers.

24.

D. Meiosis in sporophytes produce s haploid spores.

25.

C. Autotrophic nutrition.

26.

C. Mesoderm - nervous system.

27.

C. By ingesting it.

28.

E. A , B and C.

●●●●●●●●●●● THANK YOU ●●●●●●●

○○○○○○○○○ ALL THE BEST ○○○○○○○○