Animal Evolution - Amazon Web Services
... similarity between organisms. The term ‘homology’ had already been in use for some time, and Owen (1848) had used it in a practical attempt to create a common anatomical nomenclature for the vertebrates, but it was Darwin’s ideas about evolution that gave the word its present meaning and importance: ...
... similarity between organisms. The term ‘homology’ had already been in use for some time, and Owen (1848) had used it in a practical attempt to create a common anatomical nomenclature for the vertebrates, but it was Darwin’s ideas about evolution that gave the word its present meaning and importance: ...
SSLC SCIENCE BIOLOGY ONE MARK TEST
... leading to reduction in the number of chromosomes iv) without dividing the nucleus 45. Pick out the item which has sequential arrangement. i) zygotene -> Leptotene -> Pachytene -> Diplotene -> Diakinesis ii) Diakinesis -> zygotene -> Leptotene -> Pachytene -> Diplotene iii) Leptotene -> zygotene -> ...
... leading to reduction in the number of chromosomes iv) without dividing the nucleus 45. Pick out the item which has sequential arrangement. i) zygotene -> Leptotene -> Pachytene -> Diplotene -> Diakinesis ii) Diakinesis -> zygotene -> Leptotene -> Pachytene -> Diplotene iii) Leptotene -> zygotene -> ...
21.3 The Muscular System
... Types of Muscle Tissue. Both skeletal and cardiac muscles appear striated, or striped, because their cells are arranged in bundles. Smooth muscles are not striated because their cells are arranged in sheets instead of bundles. (From left to right, images courtesy of the Department of Histology at Ja ...
... Types of Muscle Tissue. Both skeletal and cardiac muscles appear striated, or striped, because their cells are arranged in bundles. Smooth muscles are not striated because their cells are arranged in sheets instead of bundles. (From left to right, images courtesy of the Department of Histology at Ja ...
Flatworms - atlundkvist
... 7. Because the intestine __branches__ into nearly all parts of the body, completely __digested__ food can __diffuse__ to other body tissues. 8. Like Cnidarians, flatworms expel __undigested___ materials through the _mouth _. 9. Many other flatworms are _parasites__ that feed on blood, _tissues___ or ...
... 7. Because the intestine __branches__ into nearly all parts of the body, completely __digested__ food can __diffuse__ to other body tissues. 8. Like Cnidarians, flatworms expel __undigested___ materials through the _mouth _. 9. Many other flatworms are _parasites__ that feed on blood, _tissues___ or ...
CHAPTER 31
... Its subterranean mycelium covers 965 hectares, weighs hundreds of tons, and has been growing for 1,900 years. A hundred thousand species of fungi have been described, but it is estimated that there are actually as many as 1.5 million species of fungi. o Some fungi are single-celled, but most form co ...
... Its subterranean mycelium covers 965 hectares, weighs hundreds of tons, and has been growing for 1,900 years. A hundred thousand species of fungi have been described, but it is estimated that there are actually as many as 1.5 million species of fungi. o Some fungi are single-celled, but most form co ...
Vocabulary Definitions
... parallel describing a leaf in which the veins are straight lines all running in the same direction (SRB, IG) phloem the long cells through which nutrients, such as sugars, are distributed in a plant (SRB, IG) photosynthesis a process used by plants and algae to make sugar (food) out of light, carbon ...
... parallel describing a leaf in which the veins are straight lines all running in the same direction (SRB, IG) phloem the long cells through which nutrients, such as sugars, are distributed in a plant (SRB, IG) photosynthesis a process used by plants and algae to make sugar (food) out of light, carbon ...
biology specimen assessment materials
... A student investigated the action of the enzyme catalase. The student homogenised 1g of potato tissue in 5cm3 of water and soaked discs of filter paper of 5mm diameter in the potato extract. The filter paper was then pushed to the bottom of a test tube containing a fixed height of hydrogen peroxide ...
... A student investigated the action of the enzyme catalase. The student homogenised 1g of potato tissue in 5cm3 of water and soaked discs of filter paper of 5mm diameter in the potato extract. The filter paper was then pushed to the bottom of a test tube containing a fixed height of hydrogen peroxide ...
Chapter 21 - Las Positas College
... from the bloodstream for disposal via the same air tubes. This life-sustaining interaction between the cardiovascular system and the respiratory system provides the oxygen needed by every cell for its survival. If your cells die, tissues die, and ultimately you “suffocate” in a matter of minutes if ...
... from the bloodstream for disposal via the same air tubes. This life-sustaining interaction between the cardiovascular system and the respiratory system provides the oxygen needed by every cell for its survival. If your cells die, tissues die, and ultimately you “suffocate” in a matter of minutes if ...
*Owners manual for the human body* Dr Darko Valec
... negative thoughts, your health will be affected negatively. For example if you believe in bad spirits the prediction of a voodoo practitioner will affect you and if the voodoo practitioner tells you that you will die tomorrow at noon, you will die at that time. If you do not believe in black magic y ...
... negative thoughts, your health will be affected negatively. For example if you believe in bad spirits the prediction of a voodoo practitioner will affect you and if the voodoo practitioner tells you that you will die tomorrow at noon, you will die at that time. If you do not believe in black magic y ...
Level 5: Graphic Organisers
... (they are phagocytes – “eater cells”) use antibodies to recognise and destroy foreign substances and harmful microorganisms. White blood cells are also made in the bone marrow. Platelets clump together at the exposed edges of injured blood vessels to protect the body by stopping bleeding. When exerc ...
... (they are phagocytes – “eater cells”) use antibodies to recognise and destroy foreign substances and harmful microorganisms. White blood cells are also made in the bone marrow. Platelets clump together at the exposed edges of injured blood vessels to protect the body by stopping bleeding. When exerc ...
Lecture 13a - BlakeMathys.com
... Invertebrates • 95% of all known animals • Mammals, birds, reptiles, amphibians, and fishes are a small part of animal diversity ...
... Invertebrates • 95% of all known animals • Mammals, birds, reptiles, amphibians, and fishes are a small part of animal diversity ...
Fungi Diversity
... Like animals, fungi are heterotrophs: They use complex organic compounds as a source of carbon rather than xing carbon dioxide from the atmosphere, as some bacteria and most plants do. In addition, fungi do not x nitrogen from the atmosphere. Like animals, they must obtain it from their diet. Howe ...
... Like animals, fungi are heterotrophs: They use complex organic compounds as a source of carbon rather than xing carbon dioxide from the atmosphere, as some bacteria and most plants do. In addition, fungi do not x nitrogen from the atmosphere. Like animals, they must obtain it from their diet. Howe ...
The Women`s Health and Beauty Secret
... agronomist will tell you that plants grow best in soils that have the proper ph for that plant. That is because every organism has a range of alkalinity/acidity in which it will prosper. Outside of that range of ph, the organism dies or is greatly stressed just to survive. Thus it is that corn will ...
... agronomist will tell you that plants grow best in soils that have the proper ph for that plant. That is because every organism has a range of alkalinity/acidity in which it will prosper. Outside of that range of ph, the organism dies or is greatly stressed just to survive. Thus it is that corn will ...
Laboratory Guide - Indiana University Bloomington
... biology that centers on the cells and tissues within an organism and which, as such, serves as the foundation for other aspects of anatomy and physiology. The histological treatment of various tissues and organs will often be supplemented in lecture with material more related to other aspects of the ...
... biology that centers on the cells and tissues within an organism and which, as such, serves as the foundation for other aspects of anatomy and physiology. The histological treatment of various tissues and organs will often be supplemented in lecture with material more related to other aspects of the ...
Chapter 27 Student Notes
... – Increases genetic __________ – Primary __________ are produced throughout a male’s reproductive years – Diploid cells undergo meiosis to form four __________ __________ ...
... – Increases genetic __________ – Primary __________ are produced throughout a male’s reproductive years – Diploid cells undergo meiosis to form four __________ __________ ...
Mate choice inside an egg cell.
... controlled separately by nuclear rather than cytoplasmic factors. Because of this differential control between the two haploid sexes, egg nuclei may have the ability to choose sperm nuclei. Second, there must be detectable differences between sperm nuclei for post-plasmogamic pre-karyogamic female ...
... controlled separately by nuclear rather than cytoplasmic factors. Because of this differential control between the two haploid sexes, egg nuclei may have the ability to choose sperm nuclei. Second, there must be detectable differences between sperm nuclei for post-plasmogamic pre-karyogamic female ...
EXCRETION
... Notice that the sweat gland is a tubular structure tangled with the blood capillaries. This close association of tubes allows wastes (namely water, salts, and urea) to diffuse from the blood into the sweat gland. When body temperature rises, the fluid (sweat) is released from the gland, travels thro ...
... Notice that the sweat gland is a tubular structure tangled with the blood capillaries. This close association of tubes allows wastes (namely water, salts, and urea) to diffuse from the blood into the sweat gland. When body temperature rises, the fluid (sweat) is released from the gland, travels thro ...
Chapter. 40(Animal Form and Function)
... significantly affects thermoregulation. • Many endotherms and some ectotherms can alter the amount of blood flowing between the body core and the skin. • In vasodilation, blood flow in the skin increases, facilitating heat loss. • In vasoconstriction, blood flow in the skin decreases, lowering heat ...
... significantly affects thermoregulation. • Many endotherms and some ectotherms can alter the amount of blood flowing between the body core and the skin. • In vasodilation, blood flow in the skin increases, facilitating heat loss. • In vasoconstriction, blood flow in the skin decreases, lowering heat ...
MLHS-Biology Honors
... previously learned materials. Students who are successful at this level must not only memorize material, but must also be able to do something with the material they have learned. Teacher recommendations from their eighth grade science program are required for entry into Honors Biology. Within the H ...
... previously learned materials. Students who are successful at this level must not only memorize material, but must also be able to do something with the material they have learned. Teacher recommendations from their eighth grade science program are required for entry into Honors Biology. Within the H ...
40_lecture_presentation
... significantly affects thermoregulation. • Many endotherms and some ectotherms can alter the amount of blood flowing between the body core and the skin. • In vasodilation, blood flow in the skin increases, facilitating heat loss. • In vasoconstriction, blood flow in the skin decreases, lowering heat ...
... significantly affects thermoregulation. • Many endotherms and some ectotherms can alter the amount of blood flowing between the body core and the skin. • In vasodilation, blood flow in the skin increases, facilitating heat loss. • In vasoconstriction, blood flow in the skin decreases, lowering heat ...
Aerobic respiration
... the carbon dioxide concentration in blood near cells. 2 The oxygen and carbon dioxide concentrations shown in Figure 1 were measured in venous blood. Explain why these measurements were taken from the veins, not the arteries. 3 Look at Figure 2. (a) How many breaths per minute were taken when the pe ...
... the carbon dioxide concentration in blood near cells. 2 The oxygen and carbon dioxide concentrations shown in Figure 1 were measured in venous blood. Explain why these measurements were taken from the veins, not the arteries. 3 Look at Figure 2. (a) How many breaths per minute were taken when the pe ...
Echinoderms
... the surrounding rings of calcium carbonate. The five radial canals in turn extend out through short side branches into the hollow tube feet (figure 47.6). In some echinoderms, each tube foot has a sucker at its end; in others, suckers are absent. At the base of each tube foot is a muscular sac, the ...
... the surrounding rings of calcium carbonate. The five radial canals in turn extend out through short side branches into the hollow tube feet (figure 47.6). In some echinoderms, each tube foot has a sucker at its end; in others, suckers are absent. At the base of each tube foot is a muscular sac, the ...
HSC – Biology – Maintaining a Balance - HSC Guru
... Temperature Temperature changes also affect the haemoglobin saturation curve. As the temperature increases the haemoglobin releases more oxygen and as the temp declines the haemoglobin becomes more saturated. Temperature effects only become significant when tissues are producing large amounts of hea ...
... Temperature Temperature changes also affect the haemoglobin saturation curve. As the temperature increases the haemoglobin releases more oxygen and as the temp declines the haemoglobin becomes more saturated. Temperature effects only become significant when tissues are producing large amounts of hea ...
Chapter 47
... • Branching creates a meshwork that resists tearing and allows the heart to withstand the high pressures of blood pumping without leaking. • Intercalated discs provide strong mechanical adhesions between adjacent cells. ...
... • Branching creates a meshwork that resists tearing and allows the heart to withstand the high pressures of blood pumping without leaking. • Intercalated discs provide strong mechanical adhesions between adjacent cells. ...
tissues
... signals called hormones to receptive cells throughout the body via blood • A hormone may affect one or more regions throughout the body ...
... signals called hormones to receptive cells throughout the body via blood • A hormone may affect one or more regions throughout the body ...
Developmental biology
Developmental biology is the study of the process by which animals and plants grow and develop, and is synonymous with ontogeny. In animals most development occurs in embryonic life, but it is also found in regeneration, asexual reproduction and metamorphosis, and in the growth and differentiation of stem cells in the adult organism. In plants, development occurs in embryos, during vegetative reproduction, and in the normal outgrowth of roots, shoots and flowers.Practical outcomes from the study of animal developmental biology have included in vitro fertilization, now widely used in fertility treatment, the understanding of risks from substances that can damage the fetus (teratogens), and the creation of various animal models for human disease which are useful in research. Developmental Biology has also help to generate modern stem cell biology which promises a number of important practical benefits for human health.Many of the processes of development are now well understood, and some major textbooks of the subject are