Unit 2 Lecture Study Guide 1) What are the parts of an atom? Where are the subatomic particles found? The atoms are the smallest units of matter with their own chemical characteristics. The atoms are divided into 2 parts. The first part is the central nucleus and the electron cloud. The central nucleus contains very heavy particles and the electron cloud contains very light moving particles. The subatomic particles are the protons‚ neutrons‚ and the electrons. They are located
Premium Atom Protein DNA
Evolution and Microbiology Name: Sara Reed Grade: MYP2 Subject: Biology Teacher: Lana Brkic Evolution The Big Bang The Creation The Big Bang: * 15 billion years ago‚ universe created in explosion * 5 billion years ago‚ Earth was created * Beginning Earth was hot‚ molten spinning ball‚ as it became cooler‚ it became more and more solid * No water on surface‚ and atmosphere wasn’t formed * Evidence: 1. Universe still
Premium DNA Organism Bacteria
sexual intercourse. Starting from puberty and leading through to old age‚ the testes will produce over a thousand sperm cells every second. The sperm goes through a process called spermatogenesis this is where the cell will go through multiplication (mitosis)‚ growth and maturation (Boyle and Senior‚ 2002‚ p345). The sperm cell comprises of three sections‚ the head‚ the mid piece and the tail which is kept in shape by the plasma membrane. The head of the sperm is round in shape and contains the nucleus
Free Cell Eukaryote Cell nucleus
Syndrome has 2 different groups of cells‚ some with the normal 46 chromosomes and some with 47‚ possessing an extra chromosome 21. This can occur in 1 of 2 ways‚ one way is through a nondisjunctional event during the mitosis‚ after conception. As the first few cells undergo mitosis‚ one of them fails to split its chromosomes equally‚ resulting in a daughter cell with an extra chromosome 21. This daughter cell goes on to replicate‚ resulting in a whole line of cells with an extra chromosome 21. Because
Premium Down syndrome Chromosome Gene
enough to continue and if this is skipped like in a cancer cell it would make it so that its not grown enough to continue on and could die off.Also the checkpoint after G2 make sure it’s large enough to go on to mitosis and if it isn’t again many bad things could happen like during mitosis the cells chromosomes don’t line up properly.Finally it could occur if it skips the last checkpoint like all the other ones in a cancer cell.This would mean that the chromosomes could split not evenly resulting
Premium Cancer Prostate cancer Metastasis
CORE PRACTICAL ONE Describe how the effect of caffeine on heart rate in Daphnia can be investigated practically‚ and discuss whether there are ethical issues in the use of invertebrates. Daphnia‚ the water flea‚ is a small freshwater crustacean which lacks physiological methods of maintaining a constant body temperature. This means that if the environmental temperature changes‚ its body temperature does so too and its metabolic rate will be expected to rise or fall accordingly. So the temperature
Premium Heart rate Cell cycle
Unit 3 Lecture Study Guide 1. List the 4 primary tissue types and give the general characteristics and functions of each one. 1) Epithelial: Covers the body‚ lines the cavities‚ tubes ducts and blood vessels‚ covers the organ inside the body cavity 2) Connective: most abundant& widely distributed‚ connect‚ bind and supports structures‚ insulates‚ and transports substances. 3) Muscle: associated with the bones of the skeleton‚ the heart and in the walls of the hollow organs
Premium Blood DNA Connective tissue
environment. 4. The four organic macromolecule groups common to all living things are carbohydrates‚ proteins‚ nucleic acids‚ and fats. 5. All living things are composed of one or more cells. 6. Humans are unicellular creatures. 7. Mitosis is cell Xeroxing that occurs in prokaryotic cells. 8. Homeostasis is the process of maintaining a dynamic equilibrium of factors within which living things can exist. 9. Of the cellular metabolic processes‚ Glycolysis is the only one that
Premium Chromosome Bacteria DNA
w w w e tr .X m eP e ap UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level .c rs om *0485738200* BIOLOGY Paper 2 Structured Questions AS Candidates answer on the Question Paper. Additional Materials: Electronic calculator Ruler (cm/mm) 9700/21 October/November 2009 1 hour 15 minutes READ THESE INSTRUCTIONS FIRST Write your Centre number‚ candidate number and name in the spaces provided at the top of this
Premium Trophic level
Reproduction Male sperm fuses with female egg. If tdf (a gene) is present‚ then the embryo develops testes and produces testosterone. Female Reproductive system • Female baby develops if tdf is not present. • Tdf – a gene located on Y chromosome; if girl‚ then two X chromosomes‚ hence no Tdf. • Female hormones: progesterone and estrogen ( both secreted by mother’s ovaries and placenta which allow female genetilia to develop. Parts of the female reproductive system:
Premium Meiosis Reproductive system Pregnancy