2.5.1 Cell Structure Vocabulary: cell wall‚ centriole‚ chloroplast‚ cytoplasm‚ endoplasmic reticulum‚ Golgi apparatus‚ lysosome‚ mitochondria‚ nuclear envelope‚ nucleolus‚ nucleus‚ organelle‚ plasma membrane‚ plastid‚ ribosome‚ vacuole‚ vesicle Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. What are some of the structures inside a cell that help it to live and perform its role in an organism? ______Mitochondria‚ nucleus‚ ribosome’s. __________________________________________________________
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respond using the understanding of the cell membrane structure‚ types of transport mechanisms such as active‚ passive‚ diffusion‚ osmosis‚ and explain the movement of particles moving across the cell membrane. In this lab was divided into two parts. The first part was varying the concentration and the second part was varying the temperature. All cells are controlled by a cell membrane or plasma membrane that keeps the materials inside. When I think of a cell membrane I think of a grocery bag with
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Cells come from pre-existing cells via division Cells of all organisms fundamentally similar in structure‚ function‚ and metabolic functions Contain hereditary information passed down during cell division A cell’s volume increases faster than it’s surface area Less surface area = less are for nutrient/waste diffusion Solves via: Dividing‚ getting thinner‚ form microvilli‚ store nutrients (Microvilli – within small intestine) Cells are highly organized‚ 3 basic parts Plasma membrane Selective
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Sexual reproduction has been successful among flowering plants and mammals‚ it is brought by the following requirements. Firstly is the transfer of gametes. Sexual reproduction is only made successful when the gametes of the male and female from a pair of parents of different sexes are transferred to meet each other. In mammals‚ the male gamete is transferred to the female body by copulation to meet with the female gamete in the oviduct for successful fertilization. However‚ the ovum is only
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Estimated Number of Animal and Plant Species on Earth Believe it or not‚ there are about 950‚000 species of insects No one knows for sure how many species of animals exist on Earth. In fact‚ some 10‚000 species of animals are discovered each year‚ with over one and a half million species already described. Projections for the total number of species on Earth range from 2 million to 50 million. Animal group Number of species Vertebrates Amphibians 6‚199 Birds 9‚956 Fish 30‚000 Mammals
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Christine Otieno Estimating Osmolarity of plant Cells(potato and celery)by percentage change in weight Using different sucrose concentrations Introduction The purpose of this experiment was to estimate Osmolality of plants cells i.e. Potato and celery by converting the observed change of weight in different sucrose concentrations. The hypothesis assumes that the solute concentration of the plant samples would be indirectly proportional to the weight; there would be decrease
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Describe the key structures and functions of a eukaryotic and prokaryotic cell. Eukaryotic Cell (1) There are many organelles in the eukaryotic cell micrograph above. Some of these organelles are displayed in the prokaryotic micrograph and so‚ I have described the shared organelles in the prokaryotic micrograph section. Mitochondria The mitochondria cells break down nutrients which then creates energy. They act like a digestive system. This process is called cellular respiration. The
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Animals and Plants Extinctions causes and effects on human Nowadays ‚ animal extinction is a broad issue‚ one that involves the habitats and environments where other species live and interact with one another . Only a minority of people are concerned with extinction in today痴 society‚ while others might argue that it is a small problem because we are beyond the point of evolution and thus don’t really need to rely on other animals at all. According to statistics of scientific research
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Plants‚ also called green plants (Viridiplantae in Latin)‚ are living organisms of the kingdom Plantae including such multicellular groups as flowering plants‚ conifers‚ ferns and mosses‚ as well as‚ depending on definition‚ the green algae‚ but not red or brown seaweeds like kelp‚ nor fungi or bacteria. Green plants have cell walls with cellulose and characteristically obtain most of their energy from sunlight via photosynthesis using chlorophyll contained in chloroplasts‚ which gives them their
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differences between animal and plant cells. Although plant and animal cells both have mitochondria‚ cytoplasm‚ and ribosomes they differ in many ways. Animal cells do not have a cell wall and are round with irregular shapes. Centrioles are also present in all animal cells‚ as well as most eukaryotic cells. Plant cells only have centrioles if they are in the lower plant species. Both types of cells have vacuoles‚ but their functions are quite different. The purpose of vacuoles in a plant cell is to store
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