Animal phylogeny in the light of the trochaea theory
... Gastraeozoa here, but all sorts of specializations have evolved in connection with large amounts of yolk and/or placental nourishing of the embryos. In the gastraea, ectoderm and entoderm came into close apposition, and since a basal lamina almost without exception is found at the basal side of both ...
... Gastraeozoa here, but all sorts of specializations have evolved in connection with large amounts of yolk and/or placental nourishing of the embryos. In the gastraea, ectoderm and entoderm came into close apposition, and since a basal lamina almost without exception is found at the basal side of both ...
Alterations in gene expression in T1α null lung: a model of deficient
... their lungs with the first few breaths [11]. In normal late fetal and adult lungs, T1α protein is uniquely expressed in the apical membrane of type I alveolar epithelial cells, which form over 90% of the alveolar surface that is specialized for gas exchange [12-14]. In the absence of this protein th ...
... their lungs with the first few breaths [11]. In normal late fetal and adult lungs, T1α protein is uniquely expressed in the apical membrane of type I alveolar epithelial cells, which form over 90% of the alveolar surface that is specialized for gas exchange [12-14]. In the absence of this protein th ...
mRNA translation during oocyte maturation plays a key role in
... (PGCs) in Xenopus embryos. In this study, we sought to determine if translation of maternal mRNA during oocyte maturation is involved in the development of PGCs. Donor oocytes were collected from both stimulated (those who receive gonadotropin) and unstimulated females, artificially matured and fert ...
... (PGCs) in Xenopus embryos. In this study, we sought to determine if translation of maternal mRNA during oocyte maturation is involved in the development of PGCs. Donor oocytes were collected from both stimulated (those who receive gonadotropin) and unstimulated females, artificially matured and fert ...
attachment - WordPress.com
... The abdomen is also called the pleon, its segments are pleomeres, and its appendages are pleopods. In true crabs (i.e. Brachyura, such as Callinectes and Cancer) the abdomen is a small segmented structure whose shape varies with sex and maturity. In mature females it is broad with convex sides and c ...
... The abdomen is also called the pleon, its segments are pleomeres, and its appendages are pleopods. In true crabs (i.e. Brachyura, such as Callinectes and Cancer) the abdomen is a small segmented structure whose shape varies with sex and maturity. In mature females it is broad with convex sides and c ...
Squid Dissection Lab
... If your specimen is a female, much of the anterior mantle cavity will be occupied by two large, white nidamental glands which are not present in males (see Figure 9). These glands secrete part of the egg envelope. The ovary is a translucent, lobed mass of tissue lying in the posterior end of the vis ...
... If your specimen is a female, much of the anterior mantle cavity will be occupied by two large, white nidamental glands which are not present in males (see Figure 9). These glands secrete part of the egg envelope. The ovary is a translucent, lobed mass of tissue lying in the posterior end of the vis ...
The Development and Structure of the Anterior Region of the Body
... the body which lies anterior to the mouth and contains the brain, bears the eyes (when present), and presents no obvious signs of a segmental nature. Typically, it bears a pair of palps ventrally, and a number of antennae dorsally. The palps are innervated by nerves arising usually from the ventral ...
... the body which lies anterior to the mouth and contains the brain, bears the eyes (when present), and presents no obvious signs of a segmental nature. Typically, it bears a pair of palps ventrally, and a number of antennae dorsally. The palps are innervated by nerves arising usually from the ventral ...
Biology - PCMBToday
... 14. Aleurone layer with cells possessing dense cytoplasm filled with aleurone or protein grain is found on the outside of endosperm. 15. Leaves of dicotyledonous plants generally possess parallel venation, while reticulate venation is the characteristic feature of monocotyledonous plants. 16. Th ...
... 14. Aleurone layer with cells possessing dense cytoplasm filled with aleurone or protein grain is found on the outside of endosperm. 15. Leaves of dicotyledonous plants generally possess parallel venation, while reticulate venation is the characteristic feature of monocotyledonous plants. 16. Th ...
KIC and IVF - Kiran Infertility Center
... ovaries to develop a number of mature eggs required for fertilization. Normally, only an egg is released. A synthetic hormone called Lupron is also advised to prevent the ovaries from releasing eggs quickly. Doctors carefully monitor blood hormone levels and take ultrasound measurements of ovaries t ...
... ovaries to develop a number of mature eggs required for fertilization. Normally, only an egg is released. A synthetic hormone called Lupron is also advised to prevent the ovaries from releasing eggs quickly. Doctors carefully monitor blood hormone levels and take ultrasound measurements of ovaries t ...
Taxonomy - Brief facts
... as algae, are also used as substrata. C. intestinalis is the only species of a cosmopolitan ascidian. ...
... as algae, are also used as substrata. C. intestinalis is the only species of a cosmopolitan ascidian. ...
Location and behavior of dorsal determinants during
... removal of cytoplasm without the surface, dejellied eggs were transferred to a 6% Ficoll solution, pricked at the same sites at the same times as above and slightly squeezed with forceps until a desired volume of cytoplasm, 2-10% of the whole egg volume, was extruded (Figs 2B and 3C). Eggs were then ...
... removal of cytoplasm without the surface, dejellied eggs were transferred to a 6% Ficoll solution, pricked at the same sites at the same times as above and slightly squeezed with forceps until a desired volume of cytoplasm, 2-10% of the whole egg volume, was extruded (Figs 2B and 3C). Eggs were then ...
Glossary - Zoology
... Ganglion: A distinct clump of nerve cells that acts like a primitive brain, found in the head region of many invertebrates, an aggregation of nerve cell bodies located outside the central nervous system. Gastrocoel: = Archenteron; see coelom. Gastrodermis: See dermis. Gastrula: The blastula is trans ...
... Ganglion: A distinct clump of nerve cells that acts like a primitive brain, found in the head region of many invertebrates, an aggregation of nerve cell bodies located outside the central nervous system. Gastrocoel: = Archenteron; see coelom. Gastrodermis: See dermis. Gastrula: The blastula is trans ...
Lesser Deuterostome Phyla and Invertebrate members of
... • Circulatory - Two chambered heart with aortic arches in gill region have accessory hearts in caudal region. • Excretory - pronephric with independent mesonephric kidney posteriorly, isosmotic to sea water. • Respiratory - 5 to 16 pairs of gills (one pair or more gill openings) • Digestive -complet ...
... • Circulatory - Two chambered heart with aortic arches in gill region have accessory hearts in caudal region. • Excretory - pronephric with independent mesonephric kidney posteriorly, isosmotic to sea water. • Respiratory - 5 to 16 pairs of gills (one pair or more gill openings) • Digestive -complet ...
worksheet: classifying mammals
... hair colour, height, weight, sex and blood group are examples of characteristics which are determined by genes. We human beings have about 30,000 genes, but simpler organisms have a lot fewer genes. The more genes that humans have in common, the more similar they are. It follows that the more genes ...
... hair colour, height, weight, sex and blood group are examples of characteristics which are determined by genes. We human beings have about 30,000 genes, but simpler organisms have a lot fewer genes. The more genes that humans have in common, the more similar they are. It follows that the more genes ...
الشريحة 1
... as the dorsal fissure and the ventral fissure, respectively. These fissures divide the cord into right and left symmetrical halves. The ventral fissure is deeper and wider than the dorsal fissure According to its color in the fresh condition, the spinal cord in cross section appears is differentiate ...
... as the dorsal fissure and the ventral fissure, respectively. These fissures divide the cord into right and left symmetrical halves. The ventral fissure is deeper and wider than the dorsal fissure According to its color in the fresh condition, the spinal cord in cross section appears is differentiate ...
Pax1/Pax9-Related Genes in an Agnathan Vertebrate, Lampetra
... of each orthologue are rather well conserved within vertebrates (Krauss et al., 1991; Püschel et al., 1992; Glardon et al., 1997, 1998). In larger scale evolution including changes in the body plan, however, regulatory genes usually have acquired additional expression domains in crown groups that e ...
... of each orthologue are rather well conserved within vertebrates (Krauss et al., 1991; Püschel et al., 1992; Glardon et al., 1997, 1998). In larger scale evolution including changes in the body plan, however, regulatory genes usually have acquired additional expression domains in crown groups that e ...
Earthworm Dissection
... Fertilization of the eggs takes place outside the body as the cocoon moves forward over the body, picking up the eggs of one worm and the sperm of its mate. The pumping organs of the circulatory system are five aortic arches. Circulatory fluids travel from the arches through the ventral blood vessel ...
... Fertilization of the eggs takes place outside the body as the cocoon moves forward over the body, picking up the eggs of one worm and the sperm of its mate. The pumping organs of the circulatory system are five aortic arches. Circulatory fluids travel from the arches through the ventral blood vessel ...
Trainer 2 File
... Subphylum includes vertebrates = spinal cord So all vertebrates are chordates, but not all chordates are vertebrates However, vertebrates are the vast majority of chordates, only a few exceptions ...
... Subphylum includes vertebrates = spinal cord So all vertebrates are chordates, but not all chordates are vertebrates However, vertebrates are the vast majority of chordates, only a few exceptions ...
Prediction of Blastulation
... Predicating the blastocyst prediction model Embryonic Genome Activation (EGA) is a defining moment after D3 Many factors may contribute to abnormal development before EGA inherited genetic mutations, aneuploidy, environmental insult to germ cells, events during fertilization and sperm-related facto ...
... Predicating the blastocyst prediction model Embryonic Genome Activation (EGA) is a defining moment after D3 Many factors may contribute to abnormal development before EGA inherited genetic mutations, aneuploidy, environmental insult to germ cells, events during fertilization and sperm-related facto ...
Earthworm Dissection
... located toward the anterior of the worm. These are used for producing sperm. Use tweezers to remove these white structures from over the top of the digestive system that lies underneath it. Circulatory system The dorsal blood vessel appears as a dark brownish-red vessel running along the intestine. ...
... located toward the anterior of the worm. These are used for producing sperm. Use tweezers to remove these white structures from over the top of the digestive system that lies underneath it. Circulatory system The dorsal blood vessel appears as a dark brownish-red vessel running along the intestine. ...
Bivalve lab
... mantle. The mantle usually secretes a hard shell. In some of the more specialized molluscs, however, the shell has been lost or reduced, or has become embedded in the soft tissue. Molluscs are triploblastic coelomate animals, as are the annelids and all other higher metazoans, including the chordate ...
... mantle. The mantle usually secretes a hard shell. In some of the more specialized molluscs, however, the shell has been lost or reduced, or has become embedded in the soft tissue. Molluscs are triploblastic coelomate animals, as are the annelids and all other higher metazoans, including the chordate ...
phylum arthropoda - chelicerata
... The chelicerates have two distinct body regions; the anterior prosoma (cephalothorax) and posterior opisthosoma (abdomen) that may be divided into a mesosoma and metasoma. The anterior most appendages are the pedipalps and chelicera, which give the phylum its name and distinguish it from the mandibu ...
... The chelicerates have two distinct body regions; the anterior prosoma (cephalothorax) and posterior opisthosoma (abdomen) that may be divided into a mesosoma and metasoma. The anterior most appendages are the pedipalps and chelicera, which give the phylum its name and distinguish it from the mandibu ...
Sharks and the dogfish - Mayfield City Schools
... Like true teeth, the placoid scales have a base of dentine which contains a pulp cavity filled with connective tissue. Both scales and teeth have a spinous process covered by enamel which protrudes through the skin. ...
... Like true teeth, the placoid scales have a base of dentine which contains a pulp cavity filled with connective tissue. Both scales and teeth have a spinous process covered by enamel which protrudes through the skin. ...
Earthworm Dissection Lab
... Pre-lab Discussion: The earthworm belongs to a group of animals called annelids (segmented worms). The body of an annelid is usually divided internally and externally into well-defined segments, which may be separated from each other by membranous partitions. Except for the tail and head regions, al ...
... Pre-lab Discussion: The earthworm belongs to a group of animals called annelids (segmented worms). The body of an annelid is usually divided internally and externally into well-defined segments, which may be separated from each other by membranous partitions. Except for the tail and head regions, al ...
Spinal Cord
... Picture of segment of spinal cord: Spinal cord has right and left halves. the left half has one division. The division that you can see on the left, you can also find on the right side. This divides the gray matter into lamina. 6 lamina in posterior cord. intermediate gray matter lamina number 7. th ...
... Picture of segment of spinal cord: Spinal cord has right and left halves. the left half has one division. The division that you can see on the left, you can also find on the right side. This divides the gray matter into lamina. 6 lamina in posterior cord. intermediate gray matter lamina number 7. th ...