Track 3
... (2 marks) c. Which cell became plasmolysed? __________________________________________________________________________ (1 mark) d. Name one structure present in plant cells, which is absent in animal cells. ___________________________________________________________________________ (1 mark) e. Durin ...
... (2 marks) c. Which cell became plasmolysed? __________________________________________________________________________ (1 mark) d. Name one structure present in plant cells, which is absent in animal cells. ___________________________________________________________________________ (1 mark) e. Durin ...
CSEC Biology Revision Guide Answers.indd
... 6. Any two of the following: - The leaves of a monocotyledon have straight, parallel veins. The leaves of a dicotyledon have a network of veins. - The leaves of a monocotyledon are usually long and narrow. The leaves of a dicotyledon are usually broad. - The seeds of a monocotyledon contain one coty ...
... 6. Any two of the following: - The leaves of a monocotyledon have straight, parallel veins. The leaves of a dicotyledon have a network of veins. - The leaves of a monocotyledon are usually long and narrow. The leaves of a dicotyledon are usually broad. - The seeds of a monocotyledon contain one coty ...
Answer Key - Earl Haig Secondary School
... 33. A cell membrane is referred to as selectively permeable because not all materials can cross it; some are kept out—or in. 34. Diffusion occurs through a selectively permeable membrane. Particles diffuse from areas of high concentration to areas of low concentration until they reach a point of eq ...
... 33. A cell membrane is referred to as selectively permeable because not all materials can cross it; some are kept out—or in. 34. Diffusion occurs through a selectively permeable membrane. Particles diffuse from areas of high concentration to areas of low concentration until they reach a point of eq ...
Page 1 of 61 EOC Practice Subject: Science, Grade: HS, Year
... The tools at the top of the screen may help you answer a question. Use the Pointer tool to select or change your answer. Click the Flag button if you are unsure of the answer to a question. It marks the question so you know to go back and answer it later. Click the Pause button if you need to go awa ...
... The tools at the top of the screen may help you answer a question. Use the Pointer tool to select or change your answer. Click the Flag button if you are unsure of the answer to a question. It marks the question so you know to go back and answer it later. Click the Pause button if you need to go awa ...
Circulating blood cells function as a surveillance system for damaged tissue in Drosophila larvae. PNAS 105 , 10017-10022.
... to be an ancestral function of the immune system (2) but has not been studied extensively in organisms that possess only an innate immune system or simple open circulatory systems in which blood directly bathes the internal tissues. Larval and adult Drosophila are capable of efficiently fighting inf ...
... to be an ancestral function of the immune system (2) but has not been studied extensively in organisms that possess only an innate immune system or simple open circulatory systems in which blood directly bathes the internal tissues. Larval and adult Drosophila are capable of efficiently fighting inf ...
Summary/Reflection of Dan Freedman`s article, Science Education
... From here, the muscular left ventricle pumps the blood into the large artery, the aorta, through the aortic semilunar valve, and throughout the body. 1) Similar to the valves on the right side of the heart, the left AV valve prevents movement of blood into the atrium, and the semilunar valve prevent ...
... From here, the muscular left ventricle pumps the blood into the large artery, the aorta, through the aortic semilunar valve, and throughout the body. 1) Similar to the valves on the right side of the heart, the left AV valve prevents movement of blood into the atrium, and the semilunar valve prevent ...
Investigating the Human Body - On-site student
... guides and focus material during their visit. There are four sets of materials for Years 3–4, Years 5–6, Years 7–8 and Years 9, 10 and VCE. Each of these sets of materials contains a range of themes with individual record sheets. The choice of themes will depend on the classroom focus, the curriculu ...
... guides and focus material during their visit. There are four sets of materials for Years 3–4, Years 5–6, Years 7–8 and Years 9, 10 and VCE. Each of these sets of materials contains a range of themes with individual record sheets. The choice of themes will depend on the classroom focus, the curriculu ...
Phylum Platyhelminthes
... can survive many weeks shrinking slowly in size without feeding. They are capable of utilizing their own tissues such as reproductive tissue for food when reserves are exhausted. Lab animals often tend to shrink in size when not fed properly Liver or egg yolk Dugesia feeds various invertebrate ...
... can survive many weeks shrinking slowly in size without feeding. They are capable of utilizing their own tissues such as reproductive tissue for food when reserves are exhausted. Lab animals often tend to shrink in size when not fed properly Liver or egg yolk Dugesia feeds various invertebrate ...
Asexual & Sexual Reproduction
... Previously, you learned that cells make more cells through the process of … ...
... Previously, you learned that cells make more cells through the process of … ...
10-4
... Caenorhabditis elegans has become such a well-established laboratory animal that more is known about its biology than that of almost any other organism. Because it is only 1 mm long when mature, C. elegans can be raised in small laboratory dishes. It takes only 12 hours from fertilization of the egg ...
... Caenorhabditis elegans has become such a well-established laboratory animal that more is known about its biology than that of almost any other organism. Because it is only 1 mm long when mature, C. elegans can be raised in small laboratory dishes. It takes only 12 hours from fertilization of the egg ...
Las proteínas funcionan uniéndose en forma específica a
... from experiments done in the 1930s, when Prof. Staudinger ( link) identical subunits, or monomers, into strings of spaghetti-like molecules. About 10 years later, a second class of polymers formed by bridging random-coil polymers at various sites ( develop), giving rise to inflexible three-dimension ...
... from experiments done in the 1930s, when Prof. Staudinger ( link) identical subunits, or monomers, into strings of spaghetti-like molecules. About 10 years later, a second class of polymers formed by bridging random-coil polymers at various sites ( develop), giving rise to inflexible three-dimension ...
Chapter 2: Basic Biological Principles Lesson 2.2: Structural and
... The answer to these questions is clear once you know how a cell functions. To carry out life processes, a cell must be able to quickly pass substances into and out of the cell. For example, it must be able to pass nutrients and oxygen into the cell and waste products out of the cell. Anything that e ...
... The answer to these questions is clear once you know how a cell functions. To carry out life processes, a cell must be able to quickly pass substances into and out of the cell. For example, it must be able to pass nutrients and oxygen into the cell and waste products out of the cell. Anything that e ...
meiosis
... genotypes that are exact copies of their parent’s genotype. Sexual reproduction produces offspring that share traits with their parents but are not exactly like either parent. ...
... genotypes that are exact copies of their parent’s genotype. Sexual reproduction produces offspring that share traits with their parents but are not exactly like either parent. ...
Early Development of Vertebrates
... Establishment of the dorsal-ventral axis in mammals is not well defined. - the hypoblast forms on the side of the ICM exposed to blastocyst fluid - the dorsal axis forms from ICM cells in contact with the trophoblast and amnionic cavity ...
... Establishment of the dorsal-ventral axis in mammals is not well defined. - the hypoblast forms on the side of the ICM exposed to blastocyst fluid - the dorsal axis forms from ICM cells in contact with the trophoblast and amnionic cavity ...
One Makes Two - Arkansas GardenCorps
... Remember that an organism, like you, will divide his or her cells through mitosis so it can grow and regenerate new tissues, like skin tissue after a cut or scratch. Eventually at a single point of an organism’s life, he or she will divide cells through meiosis. This only happens in the reproductive ...
... Remember that an organism, like you, will divide his or her cells through mitosis so it can grow and regenerate new tissues, like skin tissue after a cut or scratch. Eventually at a single point of an organism’s life, he or she will divide cells through meiosis. This only happens in the reproductive ...
All About Cells - Open School BC
... roots toward water. Movement of animals from one place to another is called locomotion. ...
... roots toward water. Movement of animals from one place to another is called locomotion. ...
6_1_ 6_3 Digestion and Infectious Diseases PP-2
... Example: Pencillium fungus produces penicillin to kill bacteria ...
... Example: Pencillium fungus produces penicillin to kill bacteria ...
Collins CSEC® Biology Workbook answers A1
... soil erosion and a build-up of carbon dioxide in the atmosphere. The balance of nature is being disrupted by organisms being removed from ecosystems or added into ecosystems where they are not naturally found. Ecosystems are being destroyed for activities such as mining and construction, which resul ...
... soil erosion and a build-up of carbon dioxide in the atmosphere. The balance of nature is being disrupted by organisms being removed from ecosystems or added into ecosystems where they are not naturally found. Ecosystems are being destroyed for activities such as mining and construction, which resul ...
Bacteria and Hand Washing
... -Body Odor; Prevention: washing daily and wearing deodorant. Discuss ways that bacteria are helpful. -Good bacteria in the digestive systems of people and animals help break down food so that nutrients can be used and the waste disposed off. -Bacteria help garbage and sewage to decompose. -Dead Bact ...
... -Body Odor; Prevention: washing daily and wearing deodorant. Discuss ways that bacteria are helpful. -Good bacteria in the digestive systems of people and animals help break down food so that nutrients can be used and the waste disposed off. -Bacteria help garbage and sewage to decompose. -Dead Bact ...
Bacteria and Viruses
... Disease-causing Bacteria A small percentage of bacteria cause disease. Bacteria multiply quickly at the site of infection. Bacteria secrete a toxin. ...
... Disease-causing Bacteria A small percentage of bacteria cause disease. Bacteria multiply quickly at the site of infection. Bacteria secrete a toxin. ...
Reproduction
... Reproduction – the process of living things producing the same type of living thing. Examples – horses produce horses, humans produce humans, and tomato plants produce tomatoes. * Like produces like. There are two types of reproduction: asexual and sexual ...
... Reproduction – the process of living things producing the same type of living thing. Examples – horses produce horses, humans produce humans, and tomato plants produce tomatoes. * Like produces like. There are two types of reproduction: asexual and sexual ...
Bios 1130 Bacteria Lab 1 - Faculty Site Listing
... Protists are ancient eukaryotic organisms and many have evolved single celled complex structures and life histories. Most protists are unicellular, however, there are several algae that are colonial and form multicellular structures. Protists inhabit aqueous type environments that can range from pon ...
... Protists are ancient eukaryotic organisms and many have evolved single celled complex structures and life histories. Most protists are unicellular, however, there are several algae that are colonial and form multicellular structures. Protists inhabit aqueous type environments that can range from pon ...
Plant Life Cycles
... Instead of producing sperm or egg directly, meiosis in plants in the diploid sporophyte stage produces spores. These are single cells which can be male or female and can divide. When these spores divide by mitosis, they make haploid gametophytes. It is the gametophytes that produce sperm or eggs. Sp ...
... Instead of producing sperm or egg directly, meiosis in plants in the diploid sporophyte stage produces spores. These are single cells which can be male or female and can divide. When these spores divide by mitosis, they make haploid gametophytes. It is the gametophytes that produce sperm or eggs. Sp ...
Animal Form and Function
... 5. Diffusion between alveolar chambers and blood. Gas exchange occurs by diffusion across the moist, sac membranes of the alveoli. Oxygen diffuses into the moisture covering the membrane, through the alveolar wall, through the blood capillary wall, into the blood, and into red blood cells. Carbon di ...
... 5. Diffusion between alveolar chambers and blood. Gas exchange occurs by diffusion across the moist, sac membranes of the alveoli. Oxygen diffuses into the moisture covering the membrane, through the alveolar wall, through the blood capillary wall, into the blood, and into red blood cells. Carbon di ...
Dictyostelium discoideum
Dictyostelium discoideum is a species of soil-living amoeba belonging to the phylum Amoebozoa, infraphylum Mycetozoa. Commonly referred to as slime mold, D. discoideum is a eukaryote that transitions from a collection of unicellular amoebae into a multicellular slug and then into a fruiting body within its lifetime. Its unique asexual lifecycle consists of four stages: vegetative, aggregation, migration, and culmination. The lifecycle of D. discoideum is relatively short, which allows for timely viewing of all stages. The cells involved in the lifecycle undergo movement, chemical signaling, and development, which are applicable to human cancer research. The simplicity of its lifecycle makes D. discoideum a valuable model organism to study genetic, cellular, and biochemical processes in other organisms.