Essentials of Biology Sylvia S. Mader
... Mammals: Hair and Mammary Glands (cont.) • Monotremes such as the platypus were the earliest mammals. • Like birds, monotremes have a cloaca, a chamber at the end of the digestive tract for feces, excretory wastes, and sex cells. • Monotremes are egg-laying mammals. ...
... Mammals: Hair and Mammary Glands (cont.) • Monotremes such as the platypus were the earliest mammals. • Like birds, monotremes have a cloaca, a chamber at the end of the digestive tract for feces, excretory wastes, and sex cells. • Monotremes are egg-laying mammals. ...
Mammal Reproductive Strategies Driven by Offspring Mortality
... Such trade-offs should be evidenced as negative relationships in the residual variation that remains after accounting for the allometry of production within and between taxonomic and lifestyle groups. They can be empirically evaluated most powerfully and realistically by manipulating the relevant va ...
... Such trade-offs should be evidenced as negative relationships in the residual variation that remains after accounting for the allometry of production within and between taxonomic and lifestyle groups. They can be empirically evaluated most powerfully and realistically by manipulating the relevant va ...
Proifera
... circulatory systems. By beating their flagella, they cause water to flow through the animal. ...
... circulatory systems. By beating their flagella, they cause water to flow through the animal. ...
The Noncoelomate Animals
... in search of food. In most, ingestion of food is followed by digestion in an internal cavity. Multicellular Heterotrophs. All animals are multicellular heterotrophs. The unicellular heterotrophic organisms called Protozoa, which were at one time regarded as simple animals, are now considered to be m ...
... in search of food. In most, ingestion of food is followed by digestion in an internal cavity. Multicellular Heterotrophs. All animals are multicellular heterotrophs. The unicellular heterotrophic organisms called Protozoa, which were at one time regarded as simple animals, are now considered to be m ...
figure 1 - Philosophical Transactions of the Royal Society B
... a novel filter feeding mode) are highly derived, not directly relevant to animal origins [10]. Among extant animals, only sponges could have evolved directly from protozoa without changing feeding mode. The key problems in understanding animal origins are therefore how and why sponges evolved from a ...
... a novel filter feeding mode) are highly derived, not directly relevant to animal origins [10]. Among extant animals, only sponges could have evolved directly from protozoa without changing feeding mode. The key problems in understanding animal origins are therefore how and why sponges evolved from a ...
Unit 5 Objectives
... 14) Describe the basis for R. H. Whittaker's five-kingdom system. 15) Compare the three-domain system and R. H. Whittaker's five-kingdom system of classification. 16) Complete the table below by indicating the major events that occurred during each stage of earth’s history. Chapter 27: The World of ...
... 14) Describe the basis for R. H. Whittaker's five-kingdom system. 15) Compare the three-domain system and R. H. Whittaker's five-kingdom system of classification. 16) Complete the table below by indicating the major events that occurred during each stage of earth’s history. Chapter 27: The World of ...
flatworm
... can also reproduce asexually by transverse fission. The body constricts at the midsection, and the posterior end grips a substrate. After a few hours of tugging, the body rips apart at the constriction. Each half grows replacements of the missing pieces to form two whole flatworms. This also means t ...
... can also reproduce asexually by transverse fission. The body constricts at the midsection, and the posterior end grips a substrate. After a few hours of tugging, the body rips apart at the constriction. Each half grows replacements of the missing pieces to form two whole flatworms. This also means t ...
The Naked Mole-Rat: A New Long-Living Model for Human Aging
... longer than our current exceptional MLSP indicates. In previous studies (28,29), we noted that NMRs, unlike most mammals (30), did not exhibit age-related changes in basal metabolism, gastrointestinal absorption, or body composition between the ages of 5 and 20 years or bone density from 1 to 24 yea ...
... longer than our current exceptional MLSP indicates. In previous studies (28,29), we noted that NMRs, unlike most mammals (30), did not exhibit age-related changes in basal metabolism, gastrointestinal absorption, or body composition between the ages of 5 and 20 years or bone density from 1 to 24 yea ...
Shattered: Medawar`s Test Tubes and their Enduring Legacy of Chaos
... members of the population, however, belong to a group that should have more genetic diversity due to their experiencing a smaller series of selection events. ( These ideas are highlighted because they will later be central to the elucidation of aging’s purpose.) Thus, until a population evolved prop ...
... members of the population, however, belong to a group that should have more genetic diversity due to their experiencing a smaller series of selection events. ( These ideas are highlighted because they will later be central to the elucidation of aging’s purpose.) Thus, until a population evolved prop ...
Chapter 29 PowerPoint
... Parasitic flatworms are flukes (trematodes) and tapeworms (cestodes) Well-developed nerves and gastrovascular cavity are unnecessary ...
... Parasitic flatworms are flukes (trematodes) and tapeworms (cestodes) Well-developed nerves and gastrovascular cavity are unnecessary ...
Chapter 26
... Some of the simplest animals have radial symmetry; most complex animals have bilateral symmetry. Some of the simplest animals, such as sea anemones, have body parts that repeat around an imaginary line drawn through the center of their body. These animals exhibit radial symmetry. See Figure 26-7. An ...
... Some of the simplest animals have radial symmetry; most complex animals have bilateral symmetry. Some of the simplest animals, such as sea anemones, have body parts that repeat around an imaginary line drawn through the center of their body. These animals exhibit radial symmetry. See Figure 26-7. An ...
Intro. to Animals
... Concept 34.8: Humans are mammals that have a large brain and bipedal locomotion • The species Homo sapiens is about 200,000 years old, which is very young, considering that life has existed on Earth for at least 3.5 billion years ...
... Concept 34.8: Humans are mammals that have a large brain and bipedal locomotion • The species Homo sapiens is about 200,000 years old, which is very young, considering that life has existed on Earth for at least 3.5 billion years ...
Local.brookings.k12.sd.us
... 21. All of the following correctly describe the fate of the embryonic layers of a vertebrate EXCEPT (A) neural tube and epidermis develop from ectoderm (B) linings of digestive organs and lungs develop from endoderm (C) notochord and kidneys develop from endoderm (D) skeletal muscles and heart devel ...
... 21. All of the following correctly describe the fate of the embryonic layers of a vertebrate EXCEPT (A) neural tube and epidermis develop from ectoderm (B) linings of digestive organs and lungs develop from endoderm (C) notochord and kidneys develop from endoderm (D) skeletal muscles and heart devel ...
Animals may be characterized by the presence of a coelom
... based on which opening of the digestive cavity develops first: mouth (protostomes) or anus (deuterostomes) . The word protostome comes from the Greek word meaning "mouth first. " The protostomes include arthropods, mollusks, and annelids. Deuterostome originates from the word meaning "mouth second. ...
... based on which opening of the digestive cavity develops first: mouth (protostomes) or anus (deuterostomes) . The word protostome comes from the Greek word meaning "mouth first. " The protostomes include arthropods, mollusks, and annelids. Deuterostome originates from the word meaning "mouth second. ...
Introduction to Invertebrates
... Many animals have a total of three possible germ layers Ectoderm – outside layer; skin or outer covering , brain and peripheral nerves Endoderm – inside layer; gut track and some digestive tissues ...
... Many animals have a total of three possible germ layers Ectoderm – outside layer; skin or outer covering , brain and peripheral nerves Endoderm – inside layer; gut track and some digestive tissues ...
kingdom:animalia phylum:chordata class:graptolithina
... fossils. In 1768, in the 12th volume of Systema Naturae, he included G. sagittarius and G. scalaris, respectively a possible plant fossil and a possible graptolite. In his 1751 Skånska Resa, he included a figure of a "fossil or graptolite of a strange kind" currently thought to be a type of Climacog ...
... fossils. In 1768, in the 12th volume of Systema Naturae, he included G. sagittarius and G. scalaris, respectively a possible plant fossil and a possible graptolite. In his 1751 Skånska Resa, he included a figure of a "fossil or graptolite of a strange kind" currently thought to be a type of Climacog ...
What controls the type of larval development? Summary statement
... and lower extinction rates than species with non-feeding larvae (Jablonski, this issue). Thus type of larval development may affect differential speciation and extinction, or species selection, but larval development may affect differential speciation and extinction differently at times of massive w ...
... and lower extinction rates than species with non-feeding larvae (Jablonski, this issue). Thus type of larval development may affect differential speciation and extinction, or species selection, but larval development may affect differential speciation and extinction differently at times of massive w ...
Protostomes
... • many different lineages of animals evolved feeding structures designed to extract small prey from the water, most likely because this was the only type of food available during much of animal evolution ...
... • many different lineages of animals evolved feeding structures designed to extract small prey from the water, most likely because this was the only type of food available during much of animal evolution ...
La contamination
... substances, the __________________________ of each contaminant must be determined. It is the amount of the contaminant that causes the death of an organism when it is ingested single dose in a __________________________. Within a species, some individuals have a greater LD50 resistance to contaminan ...
... substances, the __________________________ of each contaminant must be determined. It is the amount of the contaminant that causes the death of an organism when it is ingested single dose in a __________________________. Within a species, some individuals have a greater LD50 resistance to contaminan ...
BIO 104 - Jefferson State Community College
... 3. Describe the various types of symmetry and be able to recognize examples of each. 4. Describe the differences in embryonic development between diploblastic and triphoblastic organisms. Also, be able to label the various germ layers, ectoderm, mesoderm and endoderm. 5. Be able to construct a clado ...
... 3. Describe the various types of symmetry and be able to recognize examples of each. 4. Describe the differences in embryonic development between diploblastic and triphoblastic organisms. Also, be able to label the various germ layers, ectoderm, mesoderm and endoderm. 5. Be able to construct a clado ...
Chapter 1 Preservation and the fossil record
... • Stage 1: six protosepta • Stages 2 and higher: metasepta added in the center of spaces between existing septa – Metasepta added in groups of 6, 12, 24, 48, etc. ...
... • Stage 1: six protosepta • Stages 2 and higher: metasepta added in the center of spaces between existing septa – Metasepta added in groups of 6, 12, 24, 48, etc. ...
Competency
... Describe anatomical parts used to carry out life functions within selected individuals from each major phylum and develop an understanding of how environmental conditions can modify these structures. Describe the ecological habitat each major animal group prefers and the niches that they fill. Discu ...
... Describe anatomical parts used to carry out life functions within selected individuals from each major phylum and develop an understanding of how environmental conditions can modify these structures. Describe the ecological habitat each major animal group prefers and the niches that they fill. Discu ...
Chapter 24 - Bellbrook
... 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 until another layer of ...
... 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 until another layer of ...
5 7.2 A typical cell of any organ- ism contains genetic instructions
... eating other organisms. Animals may feed on plants, other animals, or a combination of plants and animals. They have adaptations that allow them to eat particular foods. For example, the tarantula in Figure 2 has fangs. Fangs are structures it uses to pierce other animals and suck up their juices. F ...
... eating other organisms. Animals may feed on plants, other animals, or a combination of plants and animals. They have adaptations that allow them to eat particular foods. For example, the tarantula in Figure 2 has fangs. Fangs are structures it uses to pierce other animals and suck up their juices. F ...
The Metazoa
... Single layer of tissue (collared cells) Sponges also have collared cells, but these form a larger, integrated structure supported by rigid spicules or organic tissue. The differentiation of cells required the evolution of Hox Genes (genes that dictate differing functions of cells) ...
... Single layer of tissue (collared cells) Sponges also have collared cells, but these form a larger, integrated structure supported by rigid spicules or organic tissue. The differentiation of cells required the evolution of Hox Genes (genes that dictate differing functions of cells) ...