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A blastoderm is a germination point in an ovum from which the embryo develops.
Eldred Bergstrom
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What does the thin layer in egg called?
a blastoderm
What has the author Wharton B Mather written?
Wharton B. Mather has written: 'A third race of Drosophila rubida' -- subject(s): Diptera, Drosophila 'The technique of rabbit blastoderm culture' -- subject(s): Rabbits, Blastoderm
What is a 10 letter word that starts with b ends with m?
bipedalism, blastoderm, bolshevism, boosterism, bourbonism, brainstorm, bridegroom
What is the blastoderm or blastodisc in a fertlilzed egg?
The blastodisc is used to keep the girl part of the yolk still while the male part disconnects to mate with the female
Describe the composition of a blastula?
A Blastula is the usually spherical structure produced by cleavage of a zygote, consisting of a single layer of cells (blastoderm) surrounding a fluid-filled cavity (blastocoele). It is the early form of an animal embryo that develops from a morula. It is also called a blastosphere.
What are the parts of the chickens egg?
The yolk is the yellow part in the middle. The whites are the white, squishy part around the yolk. They are totally white in a hard-boiled egg. The shell is the thin, hard casing around the egg. Seriously, you should know this from kindergarten.
What do Unfertilized eggs look like?
A fertilized bird egg looks exactly the same as any other egg. There's no way to tell from the outside. Inside the shell, however, it is possible to tell (although if you crack the egg open to see, you can't hatch it). All eggs have what's called a 'blastocyst' on the yolk which is just a tiny white dot. When an egg is fertilized the blastocyst turns into a blastoderm. It houses the fertile cells that will grow into a chick under proper conditions. In an unfertilized egg, the blastocyst (also called the germinal disc) is just a tiny white dot. However, in a fertilized egg, the tiny white dot changes to a larger round spot that often looks like a bullseye.
Why is there a white dot on an egg yolk?
The white dot on the yolk is the blastodisc, or where the chick embryo would form if it were fertilized. If you're talking about the strands that look like tails on the yolk, those are the chalazae that keep the yolk in place in side the egg.
What is something about a chicken?
Chickens are domestic (farm) birds that cannot fly. The adult female chicken is called a hen, the adult male is called a rooster, and the young are called chicks. There are many different breeds of chicken that are different sizes and colors. Bantams are miniature chicken breeds. A group of chickens is called a flock. The scientific name of the chicken is Gallus domesticus (genus and species).Anatomy: The rooster is larger and more brightly colored than the hen; he also has a larger comb. Roosters make a very loud crowing sound and can be quite aggressive. Chicken eggs range in color from white to pale brown and other pale colors.Diet: Chickens have a varied diet. They eat insects, worms, fruit, seeds, acorns, grains, slugs, snails, and many other foods. They have a well-developed gizzard (a part of the stomach that contains tiny stones) that grinds up their food.Predators: Many animals eat chickens, include skunks, owls, raccoons, hawks, snakes, opossums, bobcats, and people.Reproduction: Cross Section of a Newly Laid EggThe Formation of an Egg:The Yolk: The chicken egg starts as an egg yolk inside a hen. A yolk (called an oocyte at this point) is produced by the hen's ovary in a process called ovulation.Fertilization: The yolk is released into the oviduct (a long, spiraling tube in the hen's reproductive system), where it can be fertilized internally (inside the hen) by a sperm.The Egg White (albumin): The yolk continues down the oviduct (whether or not it is fertilized) and is covered with a membrane (called the vitelline membrane), structural fibers, and layers of albumin (the egg white). This part of the oviduct is called the magnus.The Chalazae: As the egg goes down through the oviduct, it is continually rotating within the spiraling tube. This movement twists the structural fibers (called the chalazae), which form rope-like strands that anchor the yolk in the thick egg white. There are two chalazae anchoring each yolk, on opposite ends of the egg.The Eggshell: The eggshell is deposited around the egg in the lower part of the oviduct of the hen, just before it is laid. The shell is made of calcite, a crystalline form of calcium carbonate.This entire trip through the oviduct takes about one day.Growth of the Embryo: The fertilized blastodisc (now called the blastoderm) grows and becomes the embryo. As the embryo grows, its primary food source is the yolk. Waste products (like urea) collect in a sack called the allantois. The exchange of oxygen and carbon dioxide gas occurs through the eggshell; the chorion lines the inside surface of the egg and is connected to the blood vessels of the embryo.The Incubation Period: The embryo develops inside the egg for 21 days (the incubation period), until a chick pecks its way out of its eggshell and is hatched.
Are there any science word that start with b?
here are some words that start with B in science B cell B form DNA B lymphocyte b-galactosidase Babinski reflex bacillus Bacillus thuringiensis back mutation back-cross backcross bacteria Bacterial artificial chromosome bacterial lawn bactericidal Bacteriocide bacteriophage Bacteriostat bacteriostatic bacterium balance balanced lethal system balanced polymorphism balancing selection Balbiani ring band shift assay bar graph barbellate Barbiturates bark barometer Barr body basal body basal ganglia basalt base base analogue base pair base population base sequence base-ionization constant, Kb baseline basic basic oxide basic research basic solution basidia basidiomycete basilar membrane Basophil Batch testing Batesian mimicry bathymetry bay bayou BC1 bead theory beer Beer-Lambert Law Bence-Jones protein benign tumor Benzodiazepine berry beta blocker Beta globulin beta oxidation beta sheet beta-Lactamase BHQs bi(s)- bias Bicarbonate Bichromatics bidirectional promoters biennial bifid bilabiate bilateral bilaterally symmetrical Bilateria bile Bilirubin bilobalide bilocular bimodal distribution binary fission bindin binding binding motif binomial expansion binomial theorem bio- bioaccumulation Bioaugmentation biochemical biochemical genetics biochemistry biodegradation biodiversity bioenergetics biofeedback biofilms biogeochemical cycles biogeography Bioinformatics biolistic biological containment biological evolution biological species concept Biologics Biology bioluminescence biomagnification biomarker biomass biomes biopharming biopolymers bioprocessing Biopsy Bioremediation biorhythms biosensor biosphere Biotechnology biotic biotic community biotic succession biotroph biparental zygote bipedalism Bipolar Disorder bipolar neuron biramous birth bisexual bivalent bivalve black hole quenchers bladder blade BLAST blastocoel blastocyst blastoderm blastomere blastopore blastula blending inheritance blocking antibody blood blood chemistry blood grouping blood islands blood pressure blood typing blood volume blood-brain barrier bloom blossom Blotting blunt end blunt end ligation body body axis bog boiling boiling point bolus bond bond energy bone bone density bone marrow bone matrix bone resorption bone scan boom and bust cycle boreal bottle cells bottleneck bottomland Bowman's capsule Boyle's Law braced framework brachialis brachydactyly brachytherapy brackish bract bracteolate bracteole bracts Brain electrical activity mapping brain stem branch branch migration Branched DNA (bDNA) Assay branchial arches branchlet breakage and reunion breakage-fusion-bridge cycle Breakpoint Breed breed true Breeding line breeding objective breeding value bridging cross Brij-35 bristle broad heritability bronchi bronchiole Bronchoconstriction Bronchoscopy Bronsted-Lowry acid brown fat bryophyte bud budding buffer buffer system bulb bulbar region bulbourethral glands bulk element Bulk selection Bulked segregant analysis bundle-sheath cell buoyant density buoyant density of DNA buret burette Burkitt lymphoma Bursa of Fabricius bursae butanol
