evolution of invertebrates
... – Geological causes: Atmospheric oxygen reached a high enough concentration to support the metabolism of more active, mobile animals – Genetic causes: The genetic framework for complex bodies was already in place in the Hox complex of regulatory genes; variation in these genes produced animal divers ...
... – Geological causes: Atmospheric oxygen reached a high enough concentration to support the metabolism of more active, mobile animals – Genetic causes: The genetic framework for complex bodies was already in place in the Hox complex of regulatory genes; variation in these genes produced animal divers ...
Compatibility Mode
... The oldest generally accepted animal fossils that have been found are 575–550 million years old. Cambrian period – rapid animal diversification, known as the Cambrian explosion. ...
... The oldest generally accepted animal fossils that have been found are 575–550 million years old. Cambrian period – rapid animal diversification, known as the Cambrian explosion. ...
CHAPTER 40
... movement; and internal digestive organs can break down food gradually, controlling the release of stored energy. Because the immediate environment for the cells is the internal body fluid, the animal’s organ systems can control the composition of the solution bathing its cells. A complex body form i ...
... movement; and internal digestive organs can break down food gradually, controlling the release of stored energy. Because the immediate environment for the cells is the internal body fluid, the animal’s organ systems can control the composition of the solution bathing its cells. A complex body form i ...
Chapter 40 Basic Principles of Animal Form and Function Lecture
... o The endocrine system is well suited for coordinating gradual changes that affect the entire body, such as growth and development, reproduction, metabolic processes, and digestion. o The nervous system is well suited for directing immediate and rapid responses to the environment, especially in cont ...
... o The endocrine system is well suited for coordinating gradual changes that affect the entire body, such as growth and development, reproduction, metabolic processes, and digestion. o The nervous system is well suited for directing immediate and rapid responses to the environment, especially in cont ...
BIO 1407 CHAPTER 40
... Responsible for voluntary movements. When attached to bones called tendons. Skeletal muscle consists of bundles of long cells called fibers. Each fiber is a bundle of strands called myofibrils. ...
... Responsible for voluntary movements. When attached to bones called tendons. Skeletal muscle consists of bundles of long cells called fibers. Each fiber is a bundle of strands called myofibrils. ...
40_DetailLectOut_jkAR
... movement; and internal digestive organs can break down food gradually, controlling the release of stored energy. Because the immediate environment for the cells is the internal body fluid, the animal’s organ systems can control the composition of the solution bathing its cells. A complex body form i ...
... movement; and internal digestive organs can break down food gradually, controlling the release of stored energy. Because the immediate environment for the cells is the internal body fluid, the animal’s organ systems can control the composition of the solution bathing its cells. A complex body form i ...
Chapter 40 – Basic Principles of Animal Form and Function
... For instance, a parasitic tapeworm may be several meters long, but because it is very thin, most of its cells are bathed in the intestinal fluid of the worm’s vertebrate host from which it obtains nutrients. ...
... For instance, a parasitic tapeworm may be several meters long, but because it is very thin, most of its cells are bathed in the intestinal fluid of the worm’s vertebrate host from which it obtains nutrients. ...
Biology 7 Study Guide – Exam #2
... double vs single circulation; pulmonary vs systemic circuit; examples of organisms with each 2-chambered vs 3-chambered vs 4-chambered hearts and examples of organisms with each pathway of mammalian blood circulation (systemic and pulmonary circuits) anatomy of the mammalian heart (chambers, valves, ...
... double vs single circulation; pulmonary vs systemic circuit; examples of organisms with each 2-chambered vs 3-chambered vs 4-chambered hearts and examples of organisms with each pathway of mammalian blood circulation (systemic and pulmonary circuits) anatomy of the mammalian heart (chambers, valves, ...
The Oyster: A Not-So-Typical Mollusc
... no head, just a mouth in the middle. Being both bilateral and cephalized permits an animal to move in one purposeful direction. They go headfirst, letting their sense organs lead the way, like floodlights through a fog. Such animals can actively seek out the ...
... no head, just a mouth in the middle. Being both bilateral and cephalized permits an animal to move in one purposeful direction. They go headfirst, letting their sense organs lead the way, like floodlights through a fog. Such animals can actively seek out the ...
Phylum Platyhelminthes
... when infected, snails tend to crawl to tips of vegetation instead of hiding like normal in snail, larvae migrate to tentacles of snail larvae are brightly colored with red and green bands ...
... when infected, snails tend to crawl to tips of vegetation instead of hiding like normal in snail, larvae migrate to tentacles of snail larvae are brightly colored with red and green bands ...
cnidaria - Sakshieducation.com
... a. Echinodemata-pantamerous radial symmetry and mostly internal fertilization. b. Mollusca-normally oviparous and development is through a Trochophore or veliger c.Arthropoda- body shows tagmosis and respiration by tracheae. d. Chordata-notochord at some stage and separate anus and urinary openings. ...
... a. Echinodemata-pantamerous radial symmetry and mostly internal fertilization. b. Mollusca-normally oviparous and development is through a Trochophore or veliger c.Arthropoda- body shows tagmosis and respiration by tracheae. d. Chordata-notochord at some stage and separate anus and urinary openings. ...
09 Introduction to Animals
... Key Concept What characteristics are common to all animals? Directions: Put a check mark on the line before each statement that represents a characteristic of animals. ...
... Key Concept What characteristics are common to all animals? Directions: Put a check mark on the line before each statement that represents a characteristic of animals. ...
VIII. INTERNAL ENVIRONMENT REGULATION, cont
... Describes individuals colonizing virtually lifeless area with no soil; may be due to volcano, glacier Typically begins with autotrophic bacteria; followed by lichens, mosses Known as pioneer organisms Gradual development of soil due to weather, decomposition of pioneer organisms Larger organisms beg ...
... Describes individuals colonizing virtually lifeless area with no soil; may be due to volcano, glacier Typically begins with autotrophic bacteria; followed by lichens, mosses Known as pioneer organisms Gradual development of soil due to weather, decomposition of pioneer organisms Larger organisms beg ...
Chapter 24 Introduction to Animals
... endoderm cells develop into the digestive organs and the lining of the digestive tract. The outer layer of cells in the gastrula is called the ectoderm. The ectoderm cells in the gastrula continue to grow and become the nervous tissue and skin. Cell division in some animals continues in the gastrula ...
... endoderm cells develop into the digestive organs and the lining of the digestive tract. The outer layer of cells in the gastrula is called the ectoderm. The ectoderm cells in the gastrula continue to grow and become the nervous tissue and skin. Cell division in some animals continues in the gastrula ...
Pre-Lab: Animal Diversity
... cavity is known as the peritoneum. Pseudocoelomate animals have a body cavity that is not completely lined by mesodermal tissue; instead, it is bordered by mesodermal tissue toward the outside of the body and endodermal tissue toward the inside of the body. ...
... cavity is known as the peritoneum. Pseudocoelomate animals have a body cavity that is not completely lined by mesodermal tissue; instead, it is bordered by mesodermal tissue toward the outside of the body and endodermal tissue toward the inside of the body. ...
Name: Pre-Lab: Animal Diversity
... defense. The forms of cnidae tipped with a stinging barb or spine are known as nematocysts. Some cnidae can inject poison as well. Examine hydra whole mount and cross sections. Sketch the longitudinal cross section and label the gastrodermis, epidermis, mesoglea, mouth, anus, tentacles, and gastrova ...
... defense. The forms of cnidae tipped with a stinging barb or spine are known as nematocysts. Some cnidae can inject poison as well. Examine hydra whole mount and cross sections. Sketch the longitudinal cross section and label the gastrodermis, epidermis, mesoglea, mouth, anus, tentacles, and gastrova ...
animal nutrition propia
... Food goes to the first parts, called the rumen (say room-in) and the reticulum (say reh-tickyou-lm), where cellulose digestion takes place. Later on this food is brought back up into the animal's mouth to be chewed more. Then food is swallowed and goes into the third and fourth parts of the stomach, ...
... Food goes to the first parts, called the rumen (say room-in) and the reticulum (say reh-tickyou-lm), where cellulose digestion takes place. Later on this food is brought back up into the animal's mouth to be chewed more. Then food is swallowed and goes into the third and fourth parts of the stomach, ...
excretion
... – the process by which animals maintain an internal temperature within a tolerable range ! requires the ability to balance heat gained from and lost to the environment – a form of homeostasis. " An animal maintain homeostasis by controlling how much heat it produces. When cells generate ATP in ae ...
... – the process by which animals maintain an internal temperature within a tolerable range ! requires the ability to balance heat gained from and lost to the environment – a form of homeostasis. " An animal maintain homeostasis by controlling how much heat it produces. When cells generate ATP in ae ...
Vermes - Austin Community College
... Linnaeus – 1st to propose a formal classification of all life on earth most invertebrates were lumped together as “vermes” = worms here we will use the term to refer to an assortment of animals (Many different Phyla) that share a similar wormlike body plan Some Worm Characteristics 1. elongate cyl ...
... Linnaeus – 1st to propose a formal classification of all life on earth most invertebrates were lumped together as “vermes” = worms here we will use the term to refer to an assortment of animals (Many different Phyla) that share a similar wormlike body plan Some Worm Characteristics 1. elongate cyl ...
Invertebrate Animals
... disease, shown in Figure 9, can be fatal to dogs. In most areas of the United States, it’s necessary to give dogs a monthly medicine to prevent heartworm disease. Heartworms are just one kind of the many thousands of roundworms that exist. Roundworms are the most widespread animal on Earth. Billions ...
... disease, shown in Figure 9, can be fatal to dogs. In most areas of the United States, it’s necessary to give dogs a monthly medicine to prevent heartworm disease. Heartworms are just one kind of the many thousands of roundworms that exist. Roundworms are the most widespread animal on Earth. Billions ...
History of animal testing
The history of animal testing goes back to the writings of the Greeks in the 4th and 3rd centuries BCE, with Aristotle (384–322 BCE) and Erasistratus (304–258 BCE) among the first to perform experiments on living animals. Galen, a physician in 2nd-century Rome, dissected pigs and goats, and is known as the ""father of vivisection."" Avenzoar, an Arabic physician in 12th-century Moorish Spain who also practiced dissection, introduced animal testing as an experimental method of testing surgical procedures before applying them to human patients.