domingo, 28 de febrero de 2010
miércoles, 24 de febrero de 2010
3.2 Cell division is part of a cell cycle.
Mitosis Silviasalas
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Vocabulary: cell cycle, interphase, mitosis, cytokinesis
Review:
1. interphase and cell division
2. two complete sets of DNA, twice the size of when it was first formed
3. They are identical.
4. Chromosomes form (prophase), chromosomes line up (metaphase), chromosomes separate (anaphase), nuclei form (telophase).
5. In both plant and animal cells, cytokinesis is the division of the cytoplasm. In plant cells a cell plate forms and becomes a new cell wall and cell membrane. In animal cells, the cell membrane pulls inward and pinches into two new cells.
6. Yes, because cytokinesis is the division of the cytoplasm, and prokaryotes have cytoplasm to divide.
martes, 23 de febrero de 2010
3.1 Cell division occurs in all organisms.
Vocabulary: DNA, chromosome
Review:
1. It leads to growth, development, and repair.
2. It condenses and forms chromosomes.
3. Cells divide to make more cells, which allow multicellular organisms to grow. As cells divide, they can specialize.
4. It wraps in coils around proteins, and then compacts further as it arranges into chromosomes.
5. Skin cells wear out quickly, so they duplicate frequently. Brain cells usually last a long time and do not replace themselves often. Skin heals faster because its cells are better equipped to replace themselves.
jueves, 18 de febrero de 2010
13.3 Birds meet their needs on land, in water, and in the air.
Vocabulary: endotherm, incubation
13.3 Review
1. Endotherms need to consume food to produce body heat.
2. Down feathers provide insulation. Contour feathers protect the body.
3. feathers; fused and hollow bones, air sacs, crop and gizzard, keen sight and hearing
4. Both birds and reptiles lay eggs with shells. Bird eggs have hard shells while the shells of reptiles´ eggs are flexible. Most reptiles do not incubate their eggs.
5. Flight requires a great deal of energy. If food was plentiful and there was little threat of predation, the birds may no need to fly.
13.3 Review
1. Endotherms need to consume food to produce body heat.
2. Down feathers provide insulation. Contour feathers protect the body.
3. feathers; fused and hollow bones, air sacs, crop and gizzard, keen sight and hearing
4. Both birds and reptiles lay eggs with shells. Bird eggs have hard shells while the shells of reptiles´ eggs are flexible. Most reptiles do not incubate their eggs.
5. Flight requires a great deal of energy. If food was plentiful and there was little threat of predation, the birds may no need to fly.
Birdsnotes1
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13.2 Amphibians and reptiles are adapted for life on land.
Vocabulary: amphibian, reptile, ectotherm
13.2 Reveiw
1. limbs, lungs, sensory organs adapted for land
2. born with lungs, eggs have shells
3. Its body temperature should go down. The water will cool its body.
4. Diagrams should include adaptations, methods of reproduction, and how animals obtain oxygen.
5. Sample answer: a more streamlined body in sea turtle, webbing on feet of sea turtle, better underwater eyesight and other senses, and more lung capacity in sea turtle
6. Answers should include how environmental factors affect survival rates.
13.2 Reveiw
1. limbs, lungs, sensory organs adapted for land
2. born with lungs, eggs have shells
3. Its body temperature should go down. The water will cool its body.
4. Diagrams should include adaptations, methods of reproduction, and how animals obtain oxygen.
5. Sample answer: a more streamlined body in sea turtle, webbing on feet of sea turtle, better underwater eyesight and other senses, and more lung capacity in sea turtle
6. Answers should include how environmental factors affect survival rates.
13.1 Vertebrates are animals with endoskeletons.
Vocabulary: vertebrates, endoskeleton
13.1 Review
1. because they have an endoskeleton that includes vertebrae, or a backbone
2. gills, a swim bladder, a lateral line, fins, streamlined body
3. Jawless: no jaw, tube-shaped body;
Cartilaginous: skeleton made of cartilage
Bony: skeleton made of bone, scales
4. Sample Answers: similar coloration, body shapes, and similarities in behavior
5. A fish tht retained the eggs inside its body would produce fewer eggs than one that laid its eggs in water. However, eggs protected inside the parent´s body would be less vulnerable to predators.
6. Sharks are very well adapted to their environment and have been able to meet their needs without changing.
13.1 Review
1. because they have an endoskeleton that includes vertebrae, or a backbone
2. gills, a swim bladder, a lateral line, fins, streamlined body
3. Jawless: no jaw, tube-shaped body;
Cartilaginous: skeleton made of cartilage
Bony: skeleton made of bone, scales
4. Sample Answers: similar coloration, body shapes, and similarities in behavior
5. A fish tht retained the eggs inside its body would produce fewer eggs than one that laid its eggs in water. However, eggs protected inside the parent´s body would be less vulnerable to predators.
6. Sharks are very well adapted to their environment and have been able to meet their needs without changing.
Vertebrates
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domingo, 7 de febrero de 2010
Ch. 18.1 The respiratory system
Lesson Vocabulary: respiratory system, cellular respiration
18.1 Review
1. in the respiration process, to release energy
2. Nose, throat, trachea, and bronchial tubes carry air in and out of the lungs, where gas exchange occurs. Diaphragm and ribs move to cause lungs to expand.
3. also filters air and aids in speaking, couphing, sneezing
4. Diaphragm relaxes up to its original position, pushing lungs upward. At the same time, ribs move inward, collapsing lungs inward. Air moves out of lungs through bronchial tubes into trachea, then into throat and out nose or mouth.
5. Air you inhale contains more O2 and less CO2 than air you exhale.
6. Energy is expended when you exercise; rapid breathing brings more O2 into the body, which can add more energy.
18.1 Review
1. in the respiration process, to release energy
2. Nose, throat, trachea, and bronchial tubes carry air in and out of the lungs, where gas exchange occurs. Diaphragm and ribs move to cause lungs to expand.
3. also filters air and aids in speaking, couphing, sneezing
4. Diaphragm relaxes up to its original position, pushing lungs upward. At the same time, ribs move inward, collapsing lungs inward. Air moves out of lungs through bronchial tubes into trachea, then into throat and out nose or mouth.
5. Air you inhale contains more O2 and less CO2 than air you exhale.
6. Energy is expended when you exercise; rapid breathing brings more O2 into the body, which can add more energy.
lunes, 1 de febrero de 2010
5.3 Modern genetics uses DNA technology.
Lesson Vocabulary:
selective breeding, genetic engineering
5.3 Review
1. A GM organism has had a gene from another species transferred to its DNA.
2. sequencing the 3 billion nucleotide pairs in human DNA
3. Sample answer: add nutrients to foods, produce new and better drugs, increase food production, and screen for genetic disorders
4. selective breeding- selecting parent organisms to pass on traits to offspring; genetic engineering- isolating specific DNA, inserting it into another organism; both- producing organisms with desirable traits
5. no, because the trait is now coded for in all the organism´s cells
6. Sample answer: because it comes from a more natural source, or a source more similar to that of a healthy human
selective breeding, genetic engineering
5.3 Review
1. A GM organism has had a gene from another species transferred to its DNA.
2. sequencing the 3 billion nucleotide pairs in human DNA
3. Sample answer: add nutrients to foods, produce new and better drugs, increase food production, and screen for genetic disorders
4. selective breeding- selecting parent organisms to pass on traits to offspring; genetic engineering- isolating specific DNA, inserting it into another organism; both- producing organisms with desirable traits
5. no, because the trait is now coded for in all the organism´s cells
6. Sample answer: because it comes from a more natural source, or a source more similar to that of a healthy human
Genetic Engineering
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