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Most bacteria grown by fission, one cell dividing into two. When nutrients are abundant, this can result in exponential growth, with a large increase in the number of cells over a surprisingly short period of time. Bacterial cell division and the characteristics of exponential growth are illustrated with four, 3D printable models
(Source: MicroBVI)
A chart of exponential growth shows that some things change faster over time. Back in 1798, Thomas Malthus noticed that not everything grows this way. This caused people to worry, and they were sure it would lead to massive death, starvation, and famine. However, the Green Revolution kept this from happening, and scientists are currently working to produce enough food for the current exploding population. Part of the “It’s Okay to Be Smart” series.
(Source: DCMP)
Uses the fascinating setting of a circus to provide the analogy for growth. A magician creating the illusion of multiplying balls introduces microphotography, showing how cells divide and multiply. Shows how bones are continually being built and destroyed and, in a spectacular sequence of time-lapse photography, actually captures a tooth growing-from the moment it first appears out of the gum until it falls out.
The Center for Advanced Forestry Systems is using forestry science and collaborations among universities, industry, and the government to make commercially grown forests more productive and sustainable. With support from the National Science Foundation (NSF), research teams at Virginia Tech, North Carolina State University, and the University of Washington have teamed up through the center to study how new slow-release fertilizers could improve growth and not destroy waterways. Part of the National Science Foundation Series “Science Nation.”
Diagram showing the Normal Distribution. Design modalities for the image include braille with and without labels, print with and without labels in greyscale, color, and texture.
(Source: Benetech)
Explains what is normal for boys and girls at puberty: the biological facts of physical maturation, the timeline for growth for both sexes, the normal feelings of self-consciousness, the need for good personal hygiene, why mood swings happen, and preparation of the body for human sexuality and reproduction.
Live-action, colorful footage illustrates the exciting, natural highlights of summer. Activities of plants and animals during the summer season are explored. Additional concepts and terminology include: growth, development, seeds, food storage, recreation, and solstice.
Part of the "Green Careers" series. Examines how staffers at nonprofit agencies work with lawyers, lobbyists, and other concerned citizens to advocate for environmental protection and strategies for sustainable growth. Jobs profiled include the following: environmental attorney, research associate, press secretary, community organizer, and attorney.
What are the differences between fish and shellfish? The scientists will explain their differences. The scientists also explore the rate that nails grow. Is it the same for everyone? Part of the House of Science Series.
One of the fifteen parts of the "Farm to Market" series. A vegetable can be the stem, leaf, root, or even the flower of a plant. Documents the growth, maturation, and harvest of several kinds of vegetables, highlighting their similarities and differences. Follows along as these foods are packaged for market.
The hydrilla, a non-native invasive plant species, is overtaking Florida's Wakulla Springs, threatening many species that call the waterway home. The hydrilla has such a stranglehold on the springs that its aggressive growth cycle has made it impossible to totally eradicate. Instead efforts are being made to control the plant's growth in an effort to stop its encroachment into Florida's northern panhandle. Segment of video from Wild Chronicles Series.
Every cell in the body is a specific size. Host Trace Dominquez discusses some new scientific findings related to cell growth. A team of biologists has zeroed in on a previously unknown mechanism within the cell growth cycle that controls cell size. They made this fundamental finding by studying yeast cells, but it could provide insight to basic human biology. Part of the "Uno Dos of Trace" series.
The 1960s world population has nearly doubled and now tops 7 billion. Population growth, though little discussed, is putting an unprecedented burden on the planet's life systems. Brings to light the connection between overpopulation and our most pressing environmental and humanitarian problems, as well as the solutions. Also, follows Beth, an American mother and child rights advocate, who grew up in a large family of 12 as she travels to Africa to witness first-hand the impact of population growth in the developing world and its role in exacerbating poverty. While there, she meets a young Ethiopian woman, Zinet, who comes from a poor family of 12, but has found the courage to break free from long-held cultural barriers holding back women. Features a broader discussion of the solutions to overpopulation in both the developed and developing world.
Discusses how the activities and processes of cells affect our lives. Covers metabolism, diffusion, respiration, and cell growth and mitosis. Includes questions and a quiz.
Shows what happens to a boy's body during puberty, and what to expect from the physical and emotional changes that accompany it.
Covers these important topics: external anatomy, physical and emotional changes of puberty, health and hygiene, and privacy and safety.
Students investigate important processes including photosynthesis, reproduction, growth, and germination. They also learn how these processes relate to the structure of plants. Important terminology includes flower, pistil, stamen, pollen, pollination, and reproduction.
Shows what happens to a girl's body during puberty, and what to expect from the physical and emotional changes that accompany it.
Crisp, vivid video footage illustrates how living things change throughout their lives. Focuses on the life cycles of plants, insects, and frogs.
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Biology related concepts
A collection containing 59 resources, curated by Benetech
