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Biological Sciences Essay Examples

Daphnia magna

This chapter provides an overview of the biology of waterless of the genus Daphnia. It describes basic aspects of Individual physiology and nutrition, Including some remarks about Immunity. It summarizes the typical life cycle and development of Daphnia. The modes of reproduction and the induction of resting egg production in cyclic and obligate parthenogenesis forms…

Experiment Onion Cell-Biology

Obtain a sheet of lens tissue paper with lens cleaning solution and clean all the lenses of your microscope gently. Obtain a microscope glass slide. Hold It by the edges and wet It with water. Wipe both sides dry with a paper towel. Always hold the slide by the edges or you will leave fingerprints…

Micro lab quiz

The Gram Stain Compare and contrast simple and differential stalling techniques. Simple Stalling Simple stalling Is useful In determining the basic morphology of an organism. Simple stalling Involves only one reagent I. E. Crystal violet, basic fuchsia, or methyl blue. Simple dyes used to stain bacteria have a positive charge cationic (+), therefore, they are…

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Ap Biology Lab Report 4

Introduction This study was performed in order to gain more knowledge on mitosis and meiosis. This lab was done by observing mitosis in plant and animal cells, comparing the relative lengths of the stages of mitosis in onion root tip cells, stimulating the stages of meiosis, observing evidence of crossing-over in meiosis using Sordaria fimicola,…

Translocation

Translocation A. The Munch pressure flow model The Principal of Pressure-Flow Model of Phloem Transport The Munch pressure-flow model is an explanation for the movement of organic materials in phloem . By the Munch pressure-flow experiment, two dialysis tubings are connected by a glass tube. The dialysis tubings only permeable to water or particles which…

The structure of keratin and collagen and show how their structures are suited to their biological functions

Keratin and collagen are very vital within the body’s structure; both are very similar in nature, being that they derive from amino acids, which make up their respective proteins. They both fall under a group of particular proteins known as scleroproteins or fibrous in nature. Majority of their structure consist of left-handed helix structures1. Scleroproteins…

Neuromuscular Junction: Self-Quiz Answers

Chapter 1 great review of the basic anatomical areas of the body 1. Metabolism, anabolism, catabolism 2. ICF, ECF 3. True 4. False 5. False 6. Parasagittal 7. D, effectors 8. A, differentiation 9. C, hypogastric 10. C, 3 11. Axillary-armpit, inguinal-groin, cervical-neck, cranial-skull, oral-mouth, brachial-arm, orbital-eye, gluteal-buttock, buccal-cheek, cixal-hip 12. 1 superior, 12 superficial,…

Twitch Muscle Fibers

muscle contraction Introduction For a skeletal muscle fiber to contract, a stimulus must be applied to it. The stimulus is delivered by a nerve cell, or neuron. A neuron has a threadlike process called and axon that my run 91 cm or more to a muscle. A bundle of such fibers from man different neurons…

Human Origins – The Origins of Bipedalism

Upright walking is far more complicated than many people think. It requires a number of highly specialized adaptations that have taken millions of years to evolve. It is part of what defines the human race, because there is no other organism on the planet that shares this group of skills. An understanding of the origins…

Biological Lab: What Do Animal and Plant Cells Look Like

Materials: 1. Beaker 7. Eyedropper 13. Paper towel 2. Compound microscope 8. Forceps 14. Pencil 3. Coverslip 9. Human blood slide 15. Purple Onion 4. Drawing paper 10. Iodine solution 16. Scalpel 5. Elodea slide 11. Lens paper 17. Toothpick 6. Epithelial Cells Slide of Cheek 12. Microscope slide Results: 1. What is the basic…

Comparison of numbers of organisms In Coniferous And Deciduous Woodlands

An experiment was done to find out whether there was a difference in the number of organisms in the coniferous and deciduous woodlands. A quadrat of 10m by 10m was used and co-ordinates 5,1 5,2 5,3 5,4 5,5 5,6 5,7 5,8 5,9 5,10 were used because these were exactly in the middle of the quadrat…

Biology Lab: Cellular Respiration Notes

Cellular Respiration Introduction Lab Objective: In this lab, we are testing how the process of cellular respiration is affected by temperature, and also how it is different between germinating and non-germinating peas. Cellular respiration is a catabolic process (breaks down organic material into usable cell energy) that produces ATP. The electron receivers are inorganic. Cellular…

The role of bottom up and top down processes in visual perception

Theories of perception tend to explain how the visual system operates in terms of two kinds of processes: bottom up, data driven ones, that are pre-attentive, and are a consequence of how the nervous system is structured and top down or concept driven processes which rely on experience, inference and expectations. Apart from the retina,…

On the Inheritance of Acquired Traits and the Theory of Use and Disuse.

On the Inheritance of Acquired Traits and the Theory of Use and Disuse. Charles Darwin’s On the Origin of Species described in great detail a means to explain the theory of evolution through natural selection. Within his work he makes many observations in relation to the heritability of acquired characteristics. As he describes the effects…

Compare and Contrast Vertebrate and Invertebrate Vision

Although vertebrates and invertebrates originally evolved from a common ancestral root, both have developed very different physical utilities for vision. Both are fairly effective and have taken many millions of years to evolve. They contain many common underlying mechanisms but differ in the features used to provide them. The definition of an eye is ‘an…

Nonmoral Nature

In Stephen Jay Gould’s “Nonmoral Nature,” he discusses nature, and the difference between cruelty in animals and humans, and explains how the same moral can not be applied for both. The order in which he presents the different points of view is very important. At the beginning he supports his writing with sources from scientists…

Pill Bug Lab

ABSTRACT Pill bugs live in an outside environment where they are able to get the necessary amount of energy from organic matter. This environment is where water and organic matter is plentiful. In there natural habitat, pill bugs are found in dark, damp places. Living in moist places is important for pill bugs so they…

Cardiovascular System, Study Guide

Chapter 18 The Circulatory System: Blood True / False Questions 1. Hemostasis is the production of formed elements of blood. Difficulty Level: Remember/Understand Section: 18. 1 Introduction Topic: Cardiovascular System 2. Blood viscosity stems mainly from electrolytes and monomers dissolved in plasma. Difficulty Level: Remember/Understand Section: 18. 1 Introduction Topic: Cardiovascular System 3. Lymphoid hemopoiesis…

Theory of Spontaneous Origin and Biogenesis

INTRODUCTION Robert. C. Gallagher once said: “Change is inevitable- except from a vending machine. ” “Change” is the word the practically governs our world today. Everything is slowly and gradually changing, new technologies and opportunities boosting everywhere. But the underlying question which we all wishfully choose to ignore is “All the changes happening is for…

Ap Biology – Pill Bug Lab Discussion

This lab felt very “slow” because there was not a lot of action going on. The pill bugs would either walk around in circles or stay put. However, it was both fun and annoying when my group tried to put the pill bugs in the chamber and take them out. We had to put a…

Ames Test

The Spot-Overlay Ames Test was used in the lab to find the mutagenesis of Diet Coke and ThermaFlu. Along with these substances three mutant strains of salmonella were also tested. TA 1535, TA 1537, TA 1538 all lacked the ability to grow the amino acid histidine unless reverted back by the potential mutagens. After the…

Protein and Skill

The Structure and Function of Large Biological Molecules In Chapter 5, the principles of chemistry covered in earlier chapters are applied to the understanding of biological polymers and lipid membranes. The emphasis is on properly linking monomers and their polymers, and on the structural and functional diversity of the different polymer types. Particular attention is…

Cell Transport

Exercise 1: Cell Transport Mechanisms and Permeability: Activity 1: Simulating Dialysis (Simple Diffusion) Lab Report Pre-lab Quiz Results You have not completed the Pre-lab Quiz. 09/20/11 page 1 Experiment Results Predict Question: Predict Question 1: The molecular weight of urea is 60. 07. Do you think urea will diffuse through the 20 MWCO membrane? Your…

Escherichia coli and Proteus vulgaris

According to Table , Escherichia coli and Proteus vulgaris showed fermentative activity. However Proteus vulgaris only showed it for glucose, while E.coli showed it for all three of the carbohydrates. Pseudomonas aeruginosa showed no fermentation. In table 3, the only bacteria which showed a production of indole was Escherichia coli. This is because E. Coli…

Cellulose and Hemicellulose

When A.niger has been starved for 6 hours, CreA repression is alleviated and it releases a subset of scouting enzymes to find a carbon source to breakdown [2]. From six to nine hours, the scouting enzymes (or degradative enzymes) look out for complex polysaccharides which will release inducing sugars (such as xylose). The release of…

The Effects of Genetic Research in the Modern World

Stephanie Mendoza Biological Anthropology 101 Professor Deanna Heikkinen 06 October 2010 The Effects of Genetic Research in the Modern World What makes the human genome so incredibly fascinating? Is it the thousands of genetic sequences of DNA (deoxyribonucleic acid) or the fact that all life is specified by genomes? Or could it be the fact…

Test Preparation: Campbell Biology

Chapter 31: Fungi Though fungal divisions have traditionally been based on modes of sexual reproduction, molecular considerations are becoming more important. Consequently, no emphasis has been placed on the vagaries of sexual and asexual reproduction among various fungi in this Test Bank. Instead, new questions assess students’ abilities to think logically about fungal morphology, genetics,…

How Do Environmental Changes Affect A Population Lab

What role does genetics play in the variation seen in this leafhopper population? Hint: How does genetics allow for variation? When it comes to the variation seen in the leafhopper population, there are two traits that are determined by genetics. Those traits are the color of the leafhopper and their size. Natural selection would be…

Effect of Environment on Phenotype

To investigate the effect of one environmental factor on the phenotype of pea plants Background Information: Pea seeds are available with identical genetic information for height – tall or dwarf peas. These seeds can be used to demonstrate the effect of the environment on the final height of the pea plants. Tall or dwarf peas…

Isolation of Microorganisms from Environmental Samples

It is crucial in the field of microbiology to study the morphology, biological activity, and the behavior of microbes thus the isolation of such microbes from the environment is necessary because it allows scientists to study them in close proximity. Microbial life forms are found everywhere. They are major players in biochemical cycling of elements…

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