LOPHOTROCHOZOA: LOPHOPHORA AND ANNELIDA
... represented in the sea by members of the Class Polychaeta and on land by the Classes Oligochaeta (earthworms) and Hirudinea (leeches). However, recent molecular studies indicate that the group of (mostly) wormlike creatures called annelids might be more properly categorized into two other subclades, ...
... represented in the sea by members of the Class Polychaeta and on land by the Classes Oligochaeta (earthworms) and Hirudinea (leeches). However, recent molecular studies indicate that the group of (mostly) wormlike creatures called annelids might be more properly categorized into two other subclades, ...
remnant vegetation ~ values and threats
... years old, are particularly valued for their beauty and contribution to wildlife habitat. Trees planted today will take at least 100 years to attain a similar dimension in the landscape. Because remnants are generally dispersed across the landscape, they are relatively accessible to local communitie ...
... years old, are particularly valued for their beauty and contribution to wildlife habitat. Trees planted today will take at least 100 years to attain a similar dimension in the landscape. Because remnants are generally dispersed across the landscape, they are relatively accessible to local communitie ...
P. Arthropoda
... Endoderm – Innermost “germ layer”; differentiates into some of the internal tissues and the lining of most hollow organs, if these are present Mesoderm – Middle “germ layer”; differentiates into muscles, circulatory and skeletal systems, and sex organs, if these are present Ectoderm – Outermost “ger ...
... Endoderm – Innermost “germ layer”; differentiates into some of the internal tissues and the lining of most hollow organs, if these are present Mesoderm – Middle “germ layer”; differentiates into muscles, circulatory and skeletal systems, and sex organs, if these are present Ectoderm – Outermost “ger ...
animal kingdom
... gastro-vascular cavity with a single opening, mouth on hypostome. Digestion is extracellular and intracellular. Some of the cnidarians, e.g., corals have a skeleton composed of calcium carbonate. Cnidarians exhibit two basic body forms called polyp and medusa (Figure 4.6). The former is a sessile an ...
... gastro-vascular cavity with a single opening, mouth on hypostome. Digestion is extracellular and intracellular. Some of the cnidarians, e.g., corals have a skeleton composed of calcium carbonate. Cnidarians exhibit two basic body forms called polyp and medusa (Figure 4.6). The former is a sessile an ...
Traits, trees and taxa: global dimensions of biodiversity in mammals
... 2 S. Huang et al. Dimensions of biodiversity that if threatened mammal species were to go extinct, the geographical patterns of PD losses across the world’s ecoregions [27] would not be consistent with the losses of TD measured as adult body mass variance. However, the spatial scale they used (i.e. ...
... 2 S. Huang et al. Dimensions of biodiversity that if threatened mammal species were to go extinct, the geographical patterns of PD losses across the world’s ecoregions [27] would not be consistent with the losses of TD measured as adult body mass variance. However, the spatial scale they used (i.e. ...
Some Characteristics of the Phylum Cnidaria
... tentacles, allowing them to be extended to capture food. Polyps often form large colonies, where a trait known as polymorphism may occur: various polyps in the colony may take on specialized roles. For example, one polyp may only be used for defence, while another is used for reproduction and anothe ...
... tentacles, allowing them to be extended to capture food. Polyps often form large colonies, where a trait known as polymorphism may occur: various polyps in the colony may take on specialized roles. For example, one polyp may only be used for defence, while another is used for reproduction and anothe ...
View - The British Herpetological Society
... biologically rich areas on the planet. Ironically, it is also one of the regions most at risk from climate change, as evidenced by the rapid retreat of the glaciers, and only time will tell how well species will be able to adapt – if at all.” There have been 16 new amphibian discoveries in the Easte ...
... biologically rich areas on the planet. Ironically, it is also one of the regions most at risk from climate change, as evidenced by the rapid retreat of the glaciers, and only time will tell how well species will be able to adapt – if at all.” There have been 16 new amphibian discoveries in the Easte ...
Bull Kelp - Natural Resources South Australia
... like other plants. Instead, the plants fix themselves to rocks using a root-like structure called a ‘holdfast’ to prevent being swept away. These are remarkably strong, but some kelp plants can still be found washed up on the shore after strong storms. ...
... like other plants. Instead, the plants fix themselves to rocks using a root-like structure called a ‘holdfast’ to prevent being swept away. These are remarkably strong, but some kelp plants can still be found washed up on the shore after strong storms. ...
Three Domains Now Three Domains and 6 Kingdoms
... The Evolution of the Coelom In addition, this pumping could facilitate the transport of oxygen through the body without relying on the bathing of tissues in oxygenated water by diffusion through a thin ectoderm. This means that animals could efficiently deliver oxygen throughout their bodies without ...
... The Evolution of the Coelom In addition, this pumping could facilitate the transport of oxygen through the body without relying on the bathing of tissues in oxygenated water by diffusion through a thin ectoderm. This means that animals could efficiently deliver oxygen throughout their bodies without ...
5 7.2 A typical cell of any organ- ism contains genetic instructions
... Eagerly but carefully, you and the others in your group put on scuba gear as you prepare to dive into the ocean. Over the side of the boat you go. As you descend through the water, you see many kinds of fishes. When you get to the bottom, you notice other organisms, too. Some are as strange as creat ...
... Eagerly but carefully, you and the others in your group put on scuba gear as you prepare to dive into the ocean. Over the side of the boat you go. As you descend through the water, you see many kinds of fishes. When you get to the bottom, you notice other organisms, too. Some are as strange as creat ...
Animal_phyla
... is the largest of all the phyla. So far, over 1 million species have been named, and it is likely that the true number out there is 10 - 100 times greater. This phylum also includes the extinct trilobites, which were prevalent in the Paleozoic era. Because of their exoskeletons, these animals fossil ...
... is the largest of all the phyla. So far, over 1 million species have been named, and it is likely that the true number out there is 10 - 100 times greater. This phylum also includes the extinct trilobites, which were prevalent in the Paleozoic era. Because of their exoskeletons, these animals fossil ...
Document
... 18. Some cnidarians go through both a motile and a sessile (attached) stage during their life cycle. The attached stage is called a(n) _____. a. embryo b. medusa c. larva d. polyp 19. The choanocyte of a sponge and the nematocyst (of a cnidocyte) of a cnidarian both function in _____. a. reproductio ...
... 18. Some cnidarians go through both a motile and a sessile (attached) stage during their life cycle. The attached stage is called a(n) _____. a. embryo b. medusa c. larva d. polyp 19. The choanocyte of a sponge and the nematocyst (of a cnidocyte) of a cnidarian both function in _____. a. reproductio ...
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. ...
College Biology - Problem Drill 15: The Evolution of Animal Diversity
... sophistication and resembled acoelomates. All surviving animals today can be traced back to their ancestors to this time period. Development of hard body parts, such as teeth, resulted in a more sophisticated diet for both predator and prey. Hard body parts were easily identified from fossil records ...
... sophistication and resembled acoelomates. All surviving animals today can be traced back to their ancestors to this time period. Development of hard body parts, such as teeth, resulted in a more sophisticated diet for both predator and prey. Hard body parts were easily identified from fossil records ...
AP Biology - Problem Drill 16: The Evolution of Animal Diversity
... sophistication and resembled acoelomates. All surviving animals today can be traced back to their ancestors to this time period. Development of hard body parts, such as teeth, resulted in a more sophisticated diet for both predator and prey. Hard body parts were easily identified from fossil records ...
... sophistication and resembled acoelomates. All surviving animals today can be traced back to their ancestors to this time period. Development of hard body parts, such as teeth, resulted in a more sophisticated diet for both predator and prey. Hard body parts were easily identified from fossil records ...
phylum Porifera
... Sponges are among the simplest of animals in terms of organization of the body. While they do possess differentiated cells, they do not possess true tissues, or organs, or organ systems. In many ways, the body of a sponge is not that different from a colonial group of cells. The general body structu ...
... Sponges are among the simplest of animals in terms of organization of the body. While they do possess differentiated cells, they do not possess true tissues, or organs, or organ systems. In many ways, the body of a sponge is not that different from a colonial group of cells. The general body structu ...
Introduction to Animals
... Sponges Sponges do not develop tissues. Collar cells with flagella line the inside of the sponge and whip back and forth drawing water into the body of the sponge. Water and waste materials are expelled from the sponge through the osculum. ...
... Sponges Sponges do not develop tissues. Collar cells with flagella line the inside of the sponge and whip back and forth drawing water into the body of the sponge. Water and waste materials are expelled from the sponge through the osculum. ...
Vestigial Organs
... Some classes of characters are more valuable than others as reliable indicators of common ancestry. Often, the less any part of an animal is used for specialised purposes, the more important it becomes for classification. Vestigial organs are an example of this. If vestigial features have no clear f ...
... Some classes of characters are more valuable than others as reliable indicators of common ancestry. Often, the less any part of an animal is used for specialised purposes, the more important it becomes for classification. Vestigial organs are an example of this. If vestigial features have no clear f ...
Introduction to Invertebrates
... 2. Coral reefs look like big rocks, but they are actually alive. They are built from cnidarians called corals (Figure 1.10). The corals are sessile polyps that can use their tentacles to feed on ocean creatures that pass by. Their skeletons are made up of calcium carbonate, which is also known as li ...
... 2. Coral reefs look like big rocks, but they are actually alive. They are built from cnidarians called corals (Figure 1.10). The corals are sessile polyps that can use their tentacles to feed on ocean creatures that pass by. Their skeletons are made up of calcium carbonate, which is also known as li ...