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edu no longer supports Biology essays Explorer. To browse Academia. edu and the wider internet faster and more securely, please take a few seconds to upgrade your browser. Describe the digestion of a starchy meal along the human alimentary canal. a Describe how gaseous exchange occurs in terrestrial plants, biology essays. Richard Beckett. shailja yadav. Sudeep Sharma. Scott desmond. Aisyah Maisara. Ed Watts. Simranjeet Singh, biology essays. Shannakay Beckford. FORGET TSAMWISI. Rashed Qurann. USHA MINA, biology essays.
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a Distinguish between a community and a population. c Explain how the various activities of man have caused pollution of air. Describe how the mammalian ear is a daprted to its function. Describe how the human skin is adapted to its function. b Describe the mechanism of inhalation in human beings. ii Thoracic vertebra. i Cervical Vertebra. Structure and function 1mark. Describe how the blood protects the body. Presence of muscular tendous attached to the walls of ventricles and to the atria-ventricular valves from turning inside out due to changes in the pressure in the ventricles. Heart is supplied by coronary artery; which supplies food and oxygen to the cardiac muscles for their pumping action; the coronary vein in the heart removes metabolic wastes; the heart is enclosed by the pericardial membrane; that secretes a fluid which lubricates it reducing friction on the walls as it pumps; the heart is divided into two biology essays the atria-ventricular septum; that prevent mixing of oxygenated blood and deoxygenated blood; the left ventricles has a thick muscular wall; to pump blood at higher pressure to the distant body tissues.
Describe how the structure of a flowering plant is adapted to its photosynthetic functions. Presence of stomata; ensure efficient diffusion of Carbon IV Oxide into the leaf; A biology essays has cuticle! epidermis that are transparent; to allow penetration of light to the palisade cells; Photosynthesis cells. Air spaces in spongy mesophyll; allow biology essays to circulate easily; Describe the process of fertilization in flowering plants. The pollen tube enters an ovule through the micropyle; and when it reaches the centre of the ovule it penetrates the wall of the embryo sac and bursts open; the tube nucleus disintegrates leaving biology essays clear way for the entry of the male nuclei; One of the male nuclei fuses with the egg cell nucleus; to form a diploid zygote; which develops into an embryo; while the other male nucleus fuses with the polar nucleuto form a triploid nucleus; This gives the double fertilization in flowering plants; 12 a State characteristics of gaseous exchange surface, biology essays.
iii They are moist dissolve gas iv They have a large surface biology essays for gaseous exchange. b Describe the mechanics of gaseous exchange in mammals, biology essays. skull of man Geographical distribution; present continents are thought to have been a large land mass joined together; continental drift led to isolation that lead to different patterns of evolution; e. camels of Africa resemble the Ilamas of S. presence of digestive, urinary, nervous systems e. The structure tied to function wrong function cancel biology essays mark of the structure. Correct structure minus function do not qualify for a mark biology essays Explain the role of osmosis in organisms 10mks Answer. Role of osmosis in organisms Absorption of water from the soil; Root hair cells of plants absorb water from the soil by osmosis; it also helps in water distribution from cell to biology essays in the body, biology essays.
Blood has two broad functions, namely protective and transport. a Explain how blood is involved in transport, stating the constituents of blood involved. Describe how seeds and fruits are adapted to different modes of dispersal. Animal dispersal; Are succulent; to attract animals; Scented; to attract animals. Describe how the mammalian male reproductive system is adapted to perform its functions. Describe the structure and functions of various organelles in a mature animal cell. Mitochondria; urethra; conducts urine and sperms out of the body.
Rough endoplasmic reticulum ahs ribosome on its surface; and transport proteins. glycogen granules, fat droplets and dissolved substances. Ribosomes Are spherical in shape and suspended in cytoplasm biology essays attached biology essays endoplasmic reticulum; synthesis proteins. Describe the structural adaptations of the mammalian heart to its function. N the pacemaker region ; which initiate the wave of contraction leading into contraction and relaxation of muscles; the arterial-ventricular node; in the heart spreads out waves of contraction throughout the heart creating the heart beat;
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Web22/05/ · Biology Essay Ideas Microbial ecology and evolution The essence of homeostasis during pregnancy The essence of osmosis in plants An investigation into WebBiology Admission Essay Having a passion about the human biology is to endeavor into a dimension of science, bound to undiscovered founding and limitless exploration. Being WebBiology Essays 40 samples found essays on this Topic Subject: Science Pages: 7 Words: Rating: 4,7 Evolution and Male Pregnancy in Seahorses Abstract Pregnancy is
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