VERTEBRATES Vertebrates are members of the larger phylum
... well, some swim, and some do combinations of these. They all have feathers. All birds hatch from eggs, and most birds build nests for the eggs. Some birds deposit their eggs in other birds’ nests (like the cowbird). Bird bones are mostly hollow, thus very light (yet strong). Flightless birds include ...
... well, some swim, and some do combinations of these. They all have feathers. All birds hatch from eggs, and most birds build nests for the eggs. Some birds deposit their eggs in other birds’ nests (like the cowbird). Bird bones are mostly hollow, thus very light (yet strong). Flightless birds include ...
DNA
... • Error in cell growth with causes uncontrolled cell growth • Has environment and genetic variables ...
... • Error in cell growth with causes uncontrolled cell growth • Has environment and genetic variables ...
Spaying and Neutering Dogs and Cats by C. Kohn, WHS
... like structure that contains the testes, will ascend or descend to keep the temperature of the forming sperm just below the animal’s body temperature. Inside each testis is a collection of specialized cells. Small lengthy tubes called Seminiferous Tubules coil inside the testes. At the outside edge ...
... like structure that contains the testes, will ascend or descend to keep the temperature of the forming sperm just below the animal’s body temperature. Inside each testis is a collection of specialized cells. Small lengthy tubes called Seminiferous Tubules coil inside the testes. At the outside edge ...
Roughgarden
... in terms of gamete size. Nearly all sexually reproducing species have gametes of two sizes, one big, the other tiny. By definition, male function means making small gametes, and female function large gametes. By definition, the small gamete is a “sperm,” and the large gamete is an “egg.” That’s it. ...
... in terms of gamete size. Nearly all sexually reproducing species have gametes of two sizes, one big, the other tiny. By definition, male function means making small gametes, and female function large gametes. By definition, the small gamete is a “sperm,” and the large gamete is an “egg.” That’s it. ...
File
... resources in its habitat, forcing other species to migrate. » C A community whose members work together utilizes all existing resources and migratory routes. » D The largest organisms in a species receive the only breeding opportunities ...
... resources in its habitat, forcing other species to migrate. » C A community whose members work together utilizes all existing resources and migratory routes. » D The largest organisms in a species receive the only breeding opportunities ...
lecture - Fulton County Schools
... Need: deliver oxygen to all cells Adaptation: circulatory / respiratory systems ...
... Need: deliver oxygen to all cells Adaptation: circulatory / respiratory systems ...
Chapter 1 – The Scope of Biology
... – EXAMPLE: if your internal “thermostat” in your brain detects a slight rise in body temperature on a hot day, your brain signals your skin to produce sweat – sweating helps cool your body. ...
... – EXAMPLE: if your internal “thermostat” in your brain detects a slight rise in body temperature on a hot day, your brain signals your skin to produce sweat – sweating helps cool your body. ...
Phylum Mollusca
... Respiration Gills assist the ones in water Siphons bring water in and out of the body Land snails use a mantle cavity Diffusion occurs through moist skin Oxygen is carried by circulatory system ...
... Respiration Gills assist the ones in water Siphons bring water in and out of the body Land snails use a mantle cavity Diffusion occurs through moist skin Oxygen is carried by circulatory system ...
Anisogamy
... sexuality and genetic recombination, at either the population or individual level. The effect of sex and recombination {combining isolated beneficial mutations at} different genetic loci, which increases the efficiency of natural selection, is likely to be a major factor favoring their evolution and ...
... sexuality and genetic recombination, at either the population or individual level. The effect of sex and recombination {combining isolated beneficial mutations at} different genetic loci, which increases the efficiency of natural selection, is likely to be a major factor favoring their evolution and ...
Let`s Talk About Sex
... Condoms offer no protection against skin to skin STIs and only partial protection against HPV (vaccination can be used as a ...
... Condoms offer no protection against skin to skin STIs and only partial protection against HPV (vaccination can be used as a ...
Answers to Mastering Concepts Questions
... 1. What are the advantages and disadvantages of asexual and sexual reproduction? Of internal and external fertilization? Asexual reproduction produces identical clones of one individual and is advantageous in an environment that does not change much over time. Sexual reproduction requires two parent ...
... 1. What are the advantages and disadvantages of asexual and sexual reproduction? Of internal and external fertilization? Asexual reproduction produces identical clones of one individual and is advantageous in an environment that does not change much over time. Sexual reproduction requires two parent ...
BioSem2ExamReview - MrCarlsonsBiologyClass
... 3) When Gregor Mendel crossed true-breeding tall plants with true-breeding short plants, all the offspring were tall because ...
... 3) When Gregor Mendel crossed true-breeding tall plants with true-breeding short plants, all the offspring were tall because ...
Hit List vocabulary cards
... Body structure that has no function in a present day organism but was probably useful to an ancestor; provides evidence for evolution ...
... Body structure that has no function in a present day organism but was probably useful to an ancestor; provides evidence for evolution ...
10b Repro Sys III- Pregn Developmt
... after ovulation Sperm are viable for 12 to 48 hours after ejaculation Sperm cells must make their way to the uterine tube for fertilization to be possible ...
... after ovulation Sperm are viable for 12 to 48 hours after ejaculation Sperm cells must make their way to the uterine tube for fertilization to be possible ...
Topic: Reproduction
... Which diagrams best illustrate the daughter cells that result from normal MITOTIC cell division of this zygote? ...
... Which diagrams best illustrate the daughter cells that result from normal MITOTIC cell division of this zygote? ...
Substance Element Molecule Compound Organic
... Traits are characteristics of organisms such as hair color, skin tone etc. Traits can be inherited or acquired. Inherited traits are passed down to offspring form parents and are coded for by genes. Genes are sections fo DNA that contain information about an organism. DNA makes up the chromosomes (c ...
... Traits are characteristics of organisms such as hair color, skin tone etc. Traits can be inherited or acquired. Inherited traits are passed down to offspring form parents and are coded for by genes. Genes are sections fo DNA that contain information about an organism. DNA makes up the chromosomes (c ...
Worms - Cloudfront.net
... No coelum Has organs & systems 3 body layers – Ectoderm – Mesoderm – Endoderm ...
... No coelum Has organs & systems 3 body layers – Ectoderm – Mesoderm – Endoderm ...
Echinodermata “spiny skin” - cosee-os
... Collagen: Common animal fibrous protein that forms extracellular (outside the cell) skeletal materials. Madreporite: The calcareous plate used to draw water into the water vascular system. Generally, the madreporite on a sea star is visible as a small, smooth spot on the upper side (aboral) of t ...
... Collagen: Common animal fibrous protein that forms extracellular (outside the cell) skeletal materials. Madreporite: The calcareous plate used to draw water into the water vascular system. Generally, the madreporite on a sea star is visible as a small, smooth spot on the upper side (aboral) of t ...
Chapter 2 Parents & Offspring
... Inheridited Traits After years of experimenting, Mendel determined that inherited traits are passed from parents to offspring through reproduction. He believed that each inherited trait is controlled by two factors – the offspring receive one of these factors from each parent. These are calle ...
... Inheridited Traits After years of experimenting, Mendel determined that inherited traits are passed from parents to offspring through reproduction. He believed that each inherited trait is controlled by two factors – the offspring receive one of these factors from each parent. These are calle ...
miller inpress sexencyc - The University of New Mexico
... more high-quality mates than one’s sexual rivals, to have more high-quality offspring. Charles Darwin discovered sexual selection, and published a massive book about it in 1871, but sexual selection was usually ignored in biology until the 1970s, and in psychology until the 1990s. Since then, biolog ...
... more high-quality mates than one’s sexual rivals, to have more high-quality offspring. Charles Darwin discovered sexual selection, and published a massive book about it in 1871, but sexual selection was usually ignored in biology until the 1970s, and in psychology until the 1990s. Since then, biolog ...
Slide 1 - Images
... • Mammals have highly developed kidneys that control the composition of body fluids. – They filter urea from the blood. – They retain salts, sugars, and other compounds that the body cannot afford to lose. ...
... • Mammals have highly developed kidneys that control the composition of body fluids. – They filter urea from the blood. – They retain salts, sugars, and other compounds that the body cannot afford to lose. ...
Phar Discussion week 13
... cause a decrease in dopamine and norepinephrine in the brain, which can have an effect on your libido. She has been on an antidepressant SSRIs for 6 months and all SSRIs have been documented as having sexual side effects. Depression itself can cause a low libido and is very common in people with dep ...
... cause a decrease in dopamine and norepinephrine in the brain, which can have an effect on your libido. She has been on an antidepressant SSRIs for 6 months and all SSRIs have been documented as having sexual side effects. Depression itself can cause a low libido and is very common in people with dep ...
CORE SCIENCE B1 Topic 1 revision
... neighbours that can all breed with their neighbour but the ones at either end can’t. These are called a ring species. ...
... neighbours that can all breed with their neighbour but the ones at either end can’t. These are called a ring species. ...
Sexual reproduction
Sexual reproduction is a form of reproduction where two morphologically distinct types of specialized reproductive cells called gametes fuse together, involving a female's large ovum (or egg) and a male's smaller sperm. Each gamete contains half the number of chromosomes of normal cells. They are created by a specialized type of cell division, which only occurs in eukaryotic cells, known as meiosis. The two gametes fuse during fertilization to produce DNA replication and the creation of a single-celled zygote which includes genetic material from both gametes. In a process called genetic recombination, genetic material (DNA) joins up so that homologous chromosome sequences are aligned with each other, and this is followed by exchange of genetic information. Two rounds of cell division then produce four daughter cells with half the number of chromosomes from each original parent cell, and the same number of chromosomes as both parents, though self-fertilization can occur. For instance, in human reproduction each human cell contains 46 chromosomes, 23 pairs, except gamete cells, which only contain 23 chromosomes, so the child will have 23 chromosomes from each parent genetically recombined into 23 pairs. Cell division initiates the development of a new individual organism in multicellular organisms, including animals and plants, for the vast majority of whom this is the primary method of reproduction. A species is defined as a taxonomic rank. A species is often defined as the largest group of organisms where two hybrids are capable of reproducing fertile offspring, typically using sexual reproduction, although the species problem encompasses a series of difficult related questions that often come up when biologists define the word species. The evolution of sexual reproduction is a major puzzle because asexual reproduction should be able to outcompete it as every young organism created can bear its own young. This implies that an asexual population has an intrinsic capacity to grow more rapidly with each generation. This 50% cost is a fitness disadvantage of sexual reproduction. The two-fold cost of sex includes this cost and the fact that any organism can only pass on 50% of its own genes to its offspring. One definite advantage of sexual reproduction is that it prevents the accumulation of genetic mutations.Sexual selection is a mode of natural selection in which some individuals out-reproduce others of a population because they are better at securing mates for sexual reproduction. It has been described as ""a powerful evolutionary force that does not exist in asexual populations""Prokaryotes reproduce through asexual reproduction but may display processes similar to sexual reproduction (mechanisms for lateral gene transfer such as bacterial conjugation, transformation and transduction), but they do not lead to reproduction. In prokaryotes, the initial cell has additional or transformed genetic material.