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Comparison of spermatogenesis and oogenesis

Overview table - Differences and similarities Spermatogenesis Oogenesis Period From puberty to old age continuously new sperm are formed Prdnatal the primordial germ cells are formed. From this supply, oocytes reach the stage of maturation between puberty and menopause. Place Testicles Ovaries Approx.
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6.1: Prokaryotic gene regulation - Biology

Learning ObjectivesDefine operon and describe how it differs from genes organized by single proteins.Identify the functions of regulatory proteins, promoters, operators, cis- and trans-acting factors, and structural genes.Distinguish between positive vs negative and inducible vs repressible operons.
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11: Restriction mapping - Biology

Restriction endonucleases (REs) recognize and cleave specific sites in DNA molecules. In this lab, you will use REs to distinguish which plasmids contain S. cerevisiae or S. pombe ORFs or the bacterial lacZ gene.ObjectivesAt the end of this lab, students will be able to:describe the biological origins and functions of REs.
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A4. Membrane Pores - Biology

The Nuclear Pore ComplexChannels have pores which can be gated open and allow selective flow of ions. Porins have larger entrances which allow larger molecules to pass the bilayer. The biggest pore structure known is the nuclear pore complex, which has a combined molecular mass around 125,000,000! It& 39;s job is to shuttle small molecules through passive diffusion down a concentration gradient through the pore.
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The Buzzard - Wanted poster

Characteristics Name: buzzard Latin name: Buteo Class: birds Size: 40 - 60cm Weight: 600 - 1000g Age: 10 - 20 years Appearance: dark brown-white plumage Sexual dimorphism: Yes Type of diet: carnivore Food: Rodents, rabbits, fledglings Distribution : Asia, Africa, America, Europe native origin: species-dependent sleep-wake cycle: diurnal habitat: forests natural enemies: birds of prey sexual maturity: from the age of three mating season: February - May breeding season: approx.
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Sunflower

Characteristics Name: Sunflower Latin name: Helianthus annuus further names: sunflower Plant family: Korbblьtler Number of species: ca. 70 Species Area of ​​distribution: worldwide Original distribution: Central America Location of the plant: sunny Blades: from heart to heart fruits:?
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