about meiosis is true? Selected Answer: a. The chromosome number in the resulting cells is halved. Question 2 2 out of 2 points The mitotic spindle Selected Answer: e. is composed of two different types of microtubules. Question 3 2 out of 2 points A chromatid is Selected Answer: e. one-half of a newly replicated eukaryotic chromosome. Question 4 2 out of 2 points Imagine that there is a mutation in the cyclin gene
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Chapter 35 Plant Structure‚ Growth‚ and Development Lecture Outline Overview: Plastic Plants? • The fanwort‚ an aquatic weed‚ demonstrates the great developmental plasticity that is characteristic of plants. o The fanwort has feathery underwater leaves and large‚ flat‚ floating surface leaves. o Both leaf types have genetically identical cells‚ but the dissimilar environments in which they develop cause different genes involved in leaf formation to be turned on or off.
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Discussion The various stages of nuclear division were observed in this experiment. These stages are prophase‚ metaphase‚ anaphase and telophase. There are two types of nuclear division include mitosis and meiosis. Mitotic cell division is involved in the formation of an adult organism from a fertilized egg‚ asexual reproduction‚ regeneration‚ and maintenance or repair of body parts. Mitosis typically results in new somatic‚ or body cells. Meiosis results in the formation of either gametes in animals
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WHAT IS A CELL? It is the smallest unit of life that is classified as a living thing‚ and is often called the building block of life. The cell is the basic structural and functional unit of all known living organisms. Some organisms are unicellular (made of only one cell) while others are multicellular (made up of several cells). The word cell comes from the Latin cellula‚ meaning‚ a small room. The term was coined by Robert Hooke in a book he published in 1665 when he compared the cork cells he
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them the ability to move smoothly‚ without becoming entangled and breaking. How are the chromosomes copies‚ called sister chromatids‚ separated from each other? During‚ the anaphase the sister chromatids separate and move along the Kinetochore microtubules towards opposite ends of the cell. What happens when two chromatids failed to separate? When two chromatids fail to separate‚ the two new cells that are made then get destroyed because the number of chromatids is uneven. Also‚ the cell might
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Give reasons (s) 1- Formaline is used as fixative in preparation for LM examinations 2- Resolution power is difference from magnification power Complete 1- The cells are the smallest …… and …… units in the body. 2- The size of tissue sample for histological preparation is …… in light microscope and ……. in electron microscope. 3- Fixative used in tissue preparation for LM examination is …….. while in EM is …….. 4- Substance used for tissue embedding in preparation for LM examination is
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string like organelle called the cilia acts as an antenna for the cell during its movements. This is similar to the FBI and the CIA which have to know everything that is going on in order to protect the government. Centrioles are small sets of microtubules and are always found in pairs‚ they move in opposite directions during cell division somewhat like the 2 senators in each state and can be from different houses which means they would separate like cell division on capitol hill. The cytoskeleton
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As a biomedical magnet student at Wheaton High School‚ I have had opportunities to learn about research and the field of biomedical science‚ and when NIH held an interest meeting at my school describing the NIH SIP offered‚ I was immediately drawn to it. For the past few months‚ I’ve been working with a University of Maryland Ph.D student‚ who is currently studying Multiple Sclerosis‚ to develop‚ tailor and create a presentation covering Progressive SupraNuclear Palsy (PSP). Neuroscience and the
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BIO Microscopy‚ Mitosis‚ and Motility Lab Discussion Questions In the Microscopy‚ Mitosis‚ and Motility lab‚ the class used the Compound Microscope. The Compound Microscope helped examine the prokaryotic and eukaryotic cells‚ observe the different stages of mitosis‚ and compare modes of motility used by protists. The light compound microscope works with the aid of lenses such as the eyepiece. These lenses help keep the focus of the light on the eye. The fine and course adjustments also assist with
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significant role in disrupting normal synaptic communication between brain cells and neurofibrillary tangles contribute to the death of individual neurons by destroying the “supply line” within the cell. Tau proteins disengage (the glue that holds microtubules together) and nutrients cannot be transported throughout the cell resulting in cell death. The Mayo Clinic states that “less than 5% of the time‚ Alzheimer’s disease results from combination of genetic‚ lifestyle and environmental factors that
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