Animal Diversity Part I
... Phylum Porifera: Sponges Sponges are the simplest of the multicellular animals. They are the only animals that do not exhibit obvious symmetry in their body organization. They have aggregations of different cell types but do not have true tissues. It is possible to disassemble a sponge into a pile o ...
... Phylum Porifera: Sponges Sponges are the simplest of the multicellular animals. They are the only animals that do not exhibit obvious symmetry in their body organization. They have aggregations of different cell types but do not have true tissues. It is possible to disassemble a sponge into a pile o ...
Biology Review
... further reasons for eating a diet that contains lots of fresh vegetables.' John Bonner ...
... further reasons for eating a diet that contains lots of fresh vegetables.' John Bonner ...
Biology Fall Final Review Name Lab Safety, Nature of Science
... 71. A very simple animal who lives on the bottom of the ocean. It obtains oxygen by filtering water through it’s pores, that is why it is called a sessile filter-feeder. _____________________________ ...
... 71. A very simple animal who lives on the bottom of the ocean. It obtains oxygen by filtering water through it’s pores, that is why it is called a sessile filter-feeder. _____________________________ ...
Biology Department YEAR 9 SCHEME OF WORK 2014
... Sunday, 24 February 2013 Cranleigh Abu Dhabi Biology Department • describe simple experiments on diffusion and osmosis using living and non-living ...
... Sunday, 24 February 2013 Cranleigh Abu Dhabi Biology Department • describe simple experiments on diffusion and osmosis using living and non-living ...
Chapter 26: Sponges, Cnidarians, Flatworms, and Roundworms
... the sponge’s many cells alive and separated out, but you also would be able to see these same cells coming together to form a whole sponge once again. It may take several weeks for the sponge’s cells to reorganize themselves. Many biologists hypothesize that sponges evolved directly from colonial, f ...
... the sponge’s many cells alive and separated out, but you also would be able to see these same cells coming together to form a whole sponge once again. It may take several weeks for the sponge’s cells to reorganize themselves. Many biologists hypothesize that sponges evolved directly from colonial, f ...
2.4 Exchanging gases – Questions and answers Q1. Bk Ch2 S2.4
... Temperature: Warm air can hold more water vapour than cold air, therefore higher external temperatures increase the rate of water loss through transpiration. Humidity: When the surrounding air is already saturated with water vapour the rate of movement of water vapour from the leaf to the surroundin ...
... Temperature: Warm air can hold more water vapour than cold air, therefore higher external temperatures increase the rate of water loss through transpiration. Humidity: When the surrounding air is already saturated with water vapour the rate of movement of water vapour from the leaf to the surroundin ...
Answers Multi-cellular Organisms Year 8 Science Chapter 3
... 2 Function of the mouth: The teeth in the mouth grinds the food into smaller pieces for swallowing. The saliva glands moisten the food and secretes enzymes to begin breaking down carbohydrates. 3 Function of the stomach: The stomach churns the food with secreted gastric juices into a ‘soup’. The g ...
... 2 Function of the mouth: The teeth in the mouth grinds the food into smaller pieces for swallowing. The saliva glands moisten the food and secretes enzymes to begin breaking down carbohydrates. 3 Function of the stomach: The stomach churns the food with secreted gastric juices into a ‘soup’. The g ...
PARADE THROUGH THE KINGDOMS- KEY - AP Biology 2
... Heterotrophs are organisms that obtain organic food molecules by eating other organisms or their by-products. Saprobes/bacteria absorb nutrients from non-living organic material (decomposers). Autotrophs can make their own food using light or chemical energy. ...
... Heterotrophs are organisms that obtain organic food molecules by eating other organisms or their by-products. Saprobes/bacteria absorb nutrients from non-living organic material (decomposers). Autotrophs can make their own food using light or chemical energy. ...
Maintaining a Dynamic Equilibrium The Need for Homeostasis
... as its external environment changes. This ability of all living things to detect deviations and to maintain a constant internal environment is known as homeostasis. An obvious change that has occurred in the course of evolution is the development of larger multicellular organisms from microscopic, s ...
... as its external environment changes. This ability of all living things to detect deviations and to maintain a constant internal environment is known as homeostasis. An obvious change that has occurred in the course of evolution is the development of larger multicellular organisms from microscopic, s ...
ANIMAL DIVERSITY
... – They eat = heterotrophic – They move – They are multicellular – They lack cell walls – They have a diplontic life cycle – They have tissues which develop from germ layers ...
... – They eat = heterotrophic – They move – They are multicellular – They lack cell walls – They have a diplontic life cycle – They have tissues which develop from germ layers ...
PDF file - ucr biology
... Most biologists agree that organisms often possess capacities somewhat in excess of what they typically use. Animals, for example, walk most of the time, but they have bodies that can (usually) take the forces experien;ed during sprint yunning. From this observation, biologists infer that events whi ...
... Most biologists agree that organisms often possess capacities somewhat in excess of what they typically use. Animals, for example, walk most of the time, but they have bodies that can (usually) take the forces experien;ed during sprint yunning. From this observation, biologists infer that events whi ...
Wizard Test Maker
... level steady (2) the maintenance of a constant body temperature (3) cell division that is involved in normal growth (4) a rapid rise in the number of red blood cells 5016 Organisms undergo constant chemical changes as they maintain an internal balance known as (1) interdependence (3) synthesis (4) r ...
... level steady (2) the maintenance of a constant body temperature (3) cell division that is involved in normal growth (4) a rapid rise in the number of red blood cells 5016 Organisms undergo constant chemical changes as they maintain an internal balance known as (1) interdependence (3) synthesis (4) r ...
Answers to Mastering Concepts Questions
... of the signs shows a picture of the animal or its name. What criteria would you use to assign the animal to a phylum? You could start by checking for a cranium and the backbone, which would indicate a vertebrate. If the animal were wormlike and had segmentation, it might be an annelid. If it were wo ...
... of the signs shows a picture of the animal or its name. What criteria would you use to assign the animal to a phylum? You could start by checking for a cranium and the backbone, which would indicate a vertebrate. If the animal were wormlike and had segmentation, it might be an annelid. If it were wo ...
Exam 2 Review Key - Iowa State University
... A) Echinodermata – bilateral symmetry as larvae, coelom present B) Nematoda – roundworms, pseudocoelomate C) Cnidaria – radial symmetry, polyp and medusa body forms D) Platyhelminthes – flatworms, gastrovascular cavity, acoelomate E) Porifera– gastrovascular cavity, coelom present Follow up: Do spon ...
... A) Echinodermata – bilateral symmetry as larvae, coelom present B) Nematoda – roundworms, pseudocoelomate C) Cnidaria – radial symmetry, polyp and medusa body forms D) Platyhelminthes – flatworms, gastrovascular cavity, acoelomate E) Porifera– gastrovascular cavity, coelom present Follow up: Do spon ...
Cell
... ● Theodor Schwann studied animals under a microscope. He concluded that all animals are made of cells. ● Schleiden and Schwann came to the conclusion that all living things are made of cells. ● Rudolf Virchow made a hypothesis that cells divide to form new cells. Cells come from a cell that ...
... ● Theodor Schwann studied animals under a microscope. He concluded that all animals are made of cells. ● Schleiden and Schwann came to the conclusion that all living things are made of cells. ● Rudolf Virchow made a hypothesis that cells divide to form new cells. Cells come from a cell that ...
The 6 Kingdoms of Life plus Viruses
... Some bacteria have an extra layer beyond the polysaccharide cell wall found in all bacteria. ...
... Some bacteria have an extra layer beyond the polysaccharide cell wall found in all bacteria. ...
Presentation - science
... To build up sugars, nitrates and other nutrients into amino acids which are then built up into proteins. ...
... To build up sugars, nitrates and other nutrients into amino acids which are then built up into proteins. ...
ANIMAL BIOLOGY (1604) LABORATORY Week of
... • Recognize the basic structure and organization of sponges. • Understand the pattern of water flow through sponges. • Recognize the three basic body types of sponges. • Recognize and distinguish between the three cnidarian classes. • Understand the differences between the polyp and medusa forms. Ex ...
... • Recognize the basic structure and organization of sponges. • Understand the pattern of water flow through sponges. • Recognize the three basic body types of sponges. • Recognize and distinguish between the three cnidarian classes. • Understand the differences between the polyp and medusa forms. Ex ...
Lecture 13 - Northern Arizona University
... a. Flat, creeping forms - look amazingly like flatworms. b. identifiable by tentacles. c. Coeloplana ...
... a. Flat, creeping forms - look amazingly like flatworms. b. identifiable by tentacles. c. Coeloplana ...
Chapter 33 - Angelfire
... a. sessile-attaches to substratum; no nerves or muscles b. 1cm-2m; most marine, some freshwater c. filter feeders-strain food sources from water 2. structures a. spongocoel-large internal cavity b. osculum-large opening in which water exits c. choanocytes-flagellated cells which create a water curre ...
... a. sessile-attaches to substratum; no nerves or muscles b. 1cm-2m; most marine, some freshwater c. filter feeders-strain food sources from water 2. structures a. spongocoel-large internal cavity b. osculum-large opening in which water exits c. choanocytes-flagellated cells which create a water curre ...
3. Evolution of a body cavity
... • 1. Allows redundant organ systems in adults such as occurs in the annelids • 2. Allows for more efficient and flexible movement because each segment can move independently ...
... • 1. Allows redundant organ systems in adults such as occurs in the annelids • 2. Allows for more efficient and flexible movement because each segment can move independently ...
UNIT 11 INVERTEBRATES READING: Chapter 27 Introduction of
... f. Movement of water aids in gathering food and oxygen, and excreting wastes. 2. Sponges able to maintain shape by simple skeleton a. Network of protein fibers called SPONGIN. b. Some skeletons have tiny, hard particles - shaped like spiked stars called SPICULES. 1) Composed of silica dioxide or cal ...
... f. Movement of water aids in gathering food and oxygen, and excreting wastes. 2. Sponges able to maintain shape by simple skeleton a. Network of protein fibers called SPONGIN. b. Some skeletons have tiny, hard particles - shaped like spiked stars called SPICULES. 1) Composed of silica dioxide or cal ...
Class Calcarea (Calciospongiae)
... Cnidarians are radially symmetrical organisms that have one of two basic body forms: the polyp form or the medusa form. Polyps are cylindrical in shape and are generally oriented in the environment with their oral (mouth) surface directed upward and their aboral surface (opposite the mouth) attached ...
... Cnidarians are radially symmetrical organisms that have one of two basic body forms: the polyp form or the medusa form. Polyps are cylindrical in shape and are generally oriented in the environment with their oral (mouth) surface directed upward and their aboral surface (opposite the mouth) attached ...
Precambrian body plans
Until the late 1950’s, the Precambrian era was not believed to have hosted multicellular organisms. However, with radiometric dating techniques, it has been found that fossils initially found in the Ediacara Hills in Southern Australia date back to the late Precambrian era. These fossils are body impressions of organisms shaped like disks, fronds and some with ribbon patterns that were most likely tentacles.These are the earliest multicellular organisms in Earth’s history, despite the fact that unicellularity had been around for a long time before that. The requirements for multicellularity were embedded in the genes of some of these cells, specifically choanoflagellates. These are thought to be the precursors for all multicellular organisms. They are highly related to sponges (Porifera), which are the simplest multicellular organisms.In order to understand the transition to multicellularity during the Precambrian, it is important to look at the requirements for multicellularity—both biological and environmental.