Meghan Veach Bio. 101 Dr. Davis April 28‚ 2014 Chapter 18 - Evolution of Plants and Fungi Plants have been around for over 500 million years‚ the plants all differ so much but they also have many similarities among themselves and also to green algae. Some scholars even think that plants paved the way for land animals by simultaneously increasing the amount of oxygen in the Earth ’s atmosphere and decreasing the amount of carbon dioxide. Evolutionist believe that plants evolved from green
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Estrogens are released which; 1. Proliferate endometrium 2. Thin the cervical mucus 3. Stimulate pituitary to release LH * The LH; 1. Elevate concentrations of maturation promoting factor (oocytes complete meiosis one and begin meiosis II‚ stopped at metaphase) 2. Stimulate progesterone production by follicular stromal cells (luteinisation) 3. Cause follicular rupture Ovulation * High concentration of LH makes the collagenase active breaks down collagen
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Sept 27‚ 2010 Chapter 4 * With four valence electrons‚ carbon can form four covalent bonds with a variety of atoms * This tetra valence makes large‚ complex molecules possible * Fundamental groups: Alkanes and Alkenes * The electron configuration of carbon gives it covalent compatibility with many different elements * The valences of carbon and its most frequent partners (hydrogen‚ oxygen‚ and nitrogen) are the “building code” that governs the architecture of living
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then one‚ the dominant allele‚ is fully expressed in the organism’s appearance‚ the other‚ the recessive allele‚ has no noticeable affect on the organism’s appearance. o The alleles for each character segregate (separate) during gamete production (meiosis). • Genetic Vocabulary o Punnet square: predicts the results of a genetic cross between individuals of a known genotype. o Homozygous: pair of identical alleles for a character (ex/ pp) o Heterozygous: two different alleles for a gene (ex/ Pp)
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From the Jones and Lopez textbook‚ I was able to initially learn that egg activation is a “series of biochemical and physical changes in the egg” (pg 166-167). Egg activation includes the cortical reaction‚ completion of meiosis‚ an increase in the metabolic rate of the egg‚ as well as the synthesis of proteins‚ RNA‚ and DNA. Each of these steps is fundamental to preparations required for embryonic development. If the initial release of Ca++ during egg activation takes place
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Biology‚ 7e (Campbell) Chapter 23: The Evolution of Populations Chapter Questions 1) What is the most important missing evidence or observation in Darwin’s theory of 1859? A) the source of genetic variation B) evidence of the overproduction of offspring C) evidence that some organisms became extinct D) observation that variation is common in populations E) observation that competition exists in populations Answer: A Topic: Concept 23.1 Skill: Knowledge 2) Which hypothesis of inheritance
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Vertebrates are animals that are members of the subphylum Vertebrata /-ɑː/ (chordates with backbones). Vertebrates include the overwhelming majority of the phylum Chordata‚ with currently about 64‚000 species Vertebrates include the jawless fish‚ bony fish‚ sharks and rays‚ amphibians‚ reptiles‚ mammals AND ‚BIRDS 20 Main Characteristics of Vertebrates Main Characteristics of Vertebrates are given below: 1) Well developed brain. 2) Brain lodged in to box or cranium. 3) Notochord‚ forms
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more nucleotides between two adjacent nucleotides. They range in size from small‚ one base pair to large‚ a section of a chromosome.When a section of a chromosome is entered into another chromosome insertions can occur due to unequal crossover in meiosis. There are two types of insertions‚ an P nucleotide insertion and a N region addition. An insertion in an F8 gene can cause haemophilia A.Haemophilia is an x linked bleeding disorder in humans that is caused by muatations in the F8 gene. Deletions
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Unit 15 D1 Prokaryotes Prokaryotes have no organized nucleus but instead they their DNA clumped in an area but there is no organized nucleus with a membrane. This is because prokaryotes don’t have mitosis or meiosis like other cells. Scientists don’t really have a good way of describing how they duplicate‚ but it’s not through normal means. It is sometimes called simple mitosis. On the other hand eukaryotes have a nucleus which contains the DNA and the information necessary to grow reproduce and
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Genetic engineering – humans tinker with organisms genes a. Cloning –take haploid cel and replace with a diploid nucleus (comes from organism whos traits you want to duplicate. b. Recombinant DNA – DNA from 2 or more sources. Done by Euk cells during Meiosis. Always from same molecule. 3) Biologists first started doing recombinant DNA from a prok cell and combined it with another prok cell because it was easier. 4) DNA from a euk cell and combine it with DNA from a prok cell Features of bacteria
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