lecture notes ch32 Intro Animal Evolution
... sides. Some Bilateria have radial symmetry as adults (e.g. sea stars, sea cucumbers), but all are bilateral at some point during early development. Bilateria are triploblastic: they have endoderm, ectoderm, and they also have a mesoderm and the tissues that develop from the mesoderm. 11) Bilateral s ...
... sides. Some Bilateria have radial symmetry as adults (e.g. sea stars, sea cucumbers), but all are bilateral at some point during early development. Bilateria are triploblastic: they have endoderm, ectoderm, and they also have a mesoderm and the tissues that develop from the mesoderm. 11) Bilateral s ...
Platyhelminthes
... flattened with body composed of three different tissue layers: ectoderm, endoderm, and the mesoderm. These animals are bilaterally symmetrical. This phylum demonstrates an organ-system level of organization. The front or anterior portion of the body bears most of the sense organs as compared to the ...
... flattened with body composed of three different tissue layers: ectoderm, endoderm, and the mesoderm. These animals are bilaterally symmetrical. This phylum demonstrates an organ-system level of organization. The front or anterior portion of the body bears most of the sense organs as compared to the ...
Pregnancy PPT
... • Between the tenth and fourteenth days of development, the outer portions of the embryo develop important tissues, the yolk sac, placenta and the amnion. • The yolk sac supplies nutrients to the embryo for about the first two months of development ...
... • Between the tenth and fourteenth days of development, the outer portions of the embryo develop important tissues, the yolk sac, placenta and the amnion. • The yolk sac supplies nutrients to the embryo for about the first two months of development ...
Back to Reality: Reproduction Quiz Name: score : /40 1. The ovaries
... A) fetus → tissues → zygote → egg B) zygote → sperm → tissues → egg C) zygote → tissues → organs → fetus D) sperm → zygote → organs → tissues ...
... A) fetus → tissues → zygote → egg B) zygote → sperm → tissues → egg C) zygote → tissues → organs → fetus D) sperm → zygote → organs → tissues ...
Annelids, Mollusks and Arthropds
... octopuses, squids, cuttlefishes, chambered nautiluses Marine animals, free swimming Meaning “head-foot” ...
... octopuses, squids, cuttlefishes, chambered nautiluses Marine animals, free swimming Meaning “head-foot” ...
6.2 Sexual Reproduction
... Sexual reproduction brings non-identical gametes together to form a new organism – it occurs in three stages: 1. Mating – the process by which gametes are brought together at the same place and same time. 2. Fertilization – the process by which egg and sperm join to form a zygote (ie. a new organism ...
... Sexual reproduction brings non-identical gametes together to form a new organism – it occurs in three stages: 1. Mating – the process by which gametes are brought together at the same place and same time. 2. Fertilization – the process by which egg and sperm join to form a zygote (ie. a new organism ...
1008invertebrates - Michigan State University
... developmental control genes, including a cluster called the Hox genes. Modifications in body plans arise from modifications - duplications and subsequent sequence changesof developmental genes, such as those found in Hox clusters. … the common ancestor to fruit flies and mice had one gene … In Droso ...
... developmental control genes, including a cluster called the Hox genes. Modifications in body plans arise from modifications - duplications and subsequent sequence changesof developmental genes, such as those found in Hox clusters. … the common ancestor to fruit flies and mice had one gene … In Droso ...
Anatomy and Physiology Warm up questions Fall 2013 QUESTION
... together to accomplish 1 function (many muscle cells in muscle causing a contraction) ★ name four types of tissues ★ give examples of tissues ★ relate tissue function to types of cells found in tissues ★ id tissues under a ...
... together to accomplish 1 function (many muscle cells in muscle causing a contraction) ★ name four types of tissues ★ give examples of tissues ★ relate tissue function to types of cells found in tissues ★ id tissues under a ...
The Animal Kingdom and Sponges Laboratory
... In this exercise, we will examine the different morphological features commonly used to classify animals. Tissues By definition, most animals have a body composed of tissues. However, the sponges (Phylum Porifera) are an exception as they lack such tissues and are known as parazoans. Animals classif ...
... In this exercise, we will examine the different morphological features commonly used to classify animals. Tissues By definition, most animals have a body composed of tissues. However, the sponges (Phylum Porifera) are an exception as they lack such tissues and are known as parazoans. Animals classif ...
development
... This is the first in a series of complex events that conclude with the birth of a full-grown organism. Following fertilization, the zygote begins a series of mitotic cell divisions know as cleavage. Cleavage- Cells don't grow, just divide; therefore, cell ...
... This is the first in a series of complex events that conclude with the birth of a full-grown organism. Following fertilization, the zygote begins a series of mitotic cell divisions know as cleavage. Cleavage- Cells don't grow, just divide; therefore, cell ...
Evolutionary Development and HOX Genes
... Homeotic and Homeobox Genes • Control how an organism’s body develops as it grows from a zygote into a complete organism. • They determine the body plan including the polarity (front and back part) and positioning of organs. • Homeotic genes define a region or position in the embryo and code for tr ...
... Homeotic and Homeobox Genes • Control how an organism’s body develops as it grows from a zygote into a complete organism. • They determine the body plan including the polarity (front and back part) and positioning of organs. • Homeotic genes define a region or position in the embryo and code for tr ...
Lab 9: Adaptations for Survival in Terrestrial Environments
... By the end of gastrulation, three primary germ layers (ectoderm, mesoderm, and endoderm) have been formed. The mesoderm is formed from certain cells on the dorsal surface of the endoderm between the ectoderm and endoderm. In addition, a group of cells in the mesoderm form an anterior- posterior rod ...
... By the end of gastrulation, three primary germ layers (ectoderm, mesoderm, and endoderm) have been formed. The mesoderm is formed from certain cells on the dorsal surface of the endoderm between the ectoderm and endoderm. In addition, a group of cells in the mesoderm form an anterior- posterior rod ...
Ch. 10 Phylum Annelida
... Gizzard-round, muscular structure used to grind food. Contractions along with sand particles help physically grind up the food. Intestine- Stretches from segments 19 to anus. This organ chemically breaks down food and allows it to be absorbed into the bloodstream. Undigested food is released as cast ...
... Gizzard-round, muscular structure used to grind food. Contractions along with sand particles help physically grind up the food. Intestine- Stretches from segments 19 to anus. This organ chemically breaks down food and allows it to be absorbed into the bloodstream. Undigested food is released as cast ...
Survey of the Phyla- Animalia, Invertebrates
... posterior axis. Eyes for example are located at the anterior end of the animal. Differential expression of various regulatory gene that code for transcription factors play a key role in the blocking-out of anterior--->posterior anatomy in the developing embryo. The gene of the Hox complex determine ...
... posterior axis. Eyes for example are located at the anterior end of the animal. Differential expression of various regulatory gene that code for transcription factors play a key role in the blocking-out of anterior--->posterior anatomy in the developing embryo. The gene of the Hox complex determine ...
TABLE 8-1
... a sex-linked inherited disorder. The female is usually a carrier, and the male is more likely to demonstrate the effects. It is estimated that 5% to 7% of all mental retardation is caused by this syndrome. Recessive genes may cause inherited diseases, such as cystic fibrosis, sickle-cell syndrome, m ...
... a sex-linked inherited disorder. The female is usually a carrier, and the male is more likely to demonstrate the effects. It is estimated that 5% to 7% of all mental retardation is caused by this syndrome. Recessive genes may cause inherited diseases, such as cystic fibrosis, sickle-cell syndrome, m ...
POLYGENIC INHERITANCE The term “polygenic inheritance” is
... not a blend. Rather than being a mix of the two, the offspring was purple flowered. He then conceived the idea of heredity units, which he called "factors", one of which is a recessive characteristic and the other dominant. Mendel said that factors, later called genes, normally occur in pairs in ord ...
... not a blend. Rather than being a mix of the two, the offspring was purple flowered. He then conceived the idea of heredity units, which he called "factors", one of which is a recessive characteristic and the other dominant. Mendel said that factors, later called genes, normally occur in pairs in ord ...
chorion - SCIS Teachers
... • It takes place in the upper part of the oviduct. • Uterus muscle contraction helps in drawing semen from cervix to oviduct. • When sperms reach to oocyte, they have to pass glycoprotein layer (zona pellucidia) by using their hydrolytic enzymes which are stored in their acrosome. • When a sperm cel ...
... • It takes place in the upper part of the oviduct. • Uterus muscle contraction helps in drawing semen from cervix to oviduct. • When sperms reach to oocyte, they have to pass glycoprotein layer (zona pellucidia) by using their hydrolytic enzymes which are stored in their acrosome. • When a sperm cel ...
Natural History of Vertebrates Lecture Notes Chapter 2
... Though theories are numerous, the sister taxon to the Chordata is probably the Ambulacraria. The Ambulacraria consists of the Echinodermata and their sister taxon, the Hemichordata (formerly a subphylum within Chordata). The sister taxon of those two is the Xenoturbellida (figure 2-1). These three p ...
... Though theories are numerous, the sister taxon to the Chordata is probably the Ambulacraria. The Ambulacraria consists of the Echinodermata and their sister taxon, the Hemichordata (formerly a subphylum within Chordata). The sister taxon of those two is the Xenoturbellida (figure 2-1). These three p ...
Advantages of Sexual Reproduction
... • Advantages of Internal Fertilization: – Gametes not _____________ in environment where they could be destroyed – Chances of fertilization _____________ – Don’t need __________________________ • they require a huge amount of energy to make! • Still have ________________ of sperm released to guaran ...
... • Advantages of Internal Fertilization: – Gametes not _____________ in environment where they could be destroyed – Chances of fertilization _____________ – Don’t need __________________________ • they require a huge amount of energy to make! • Still have ________________ of sperm released to guaran ...
Earthworm - World of Teaching
... thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching. ...
... thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching. ...
Chapter 15- Lateral mesoderm and endoderm
... •Veins have _________________ (called EphB4) in cell membranes ...
... •Veins have _________________ (called EphB4) in cell membranes ...