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Sexual Reproduction & General Embryology
9th Grade Biology Honors Sexual Reproduction & General Embryology
42
Biology
9th Grade
02/09/2011
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Term
Hydras reproduce with this form of asexual reproduction.
 Definition
Budding.
Term
Buds form with __________.(Mitosis/Meiosis)
 Definition
Mitosis.
Term
Sex cells are also called __________.
 Definition
Gametes.
Term
Two gametes uniting to form a new organism is called __________.
 Definition
Fertilization.
Term
A fertilized cell is called a __________.
 Definition
Zygote.
Term
Fish fertilize __________ while humans fertilize __________.
 Definition
Externally; Internally.
Term
The first thing a zygote does is undergo rapid mitosis called __________.
 Definition
Cleavage.
Term
Cells get smaller with each cleavage until they reach normal size in the __________ stage.
 Definition
Blastula.
Term
Cells in the blastula can become virtually any cell. This is called being __________ or __________.
 Definition
Undifferentiated; Pluripotent.
Term
Cells first become specialized in the __________ stage.
 Definition
Gastrulation.
Term
Gastrulation begins with the formation of a __________.
 Definition
Blastopore.
Term
__________ is the primitive gut.
 Definition
Archenteron.
Term
The blastopore will become either the __________ or the __________.
 Definition
Mouth; Anus.
Term
Gastrulation ends with the formation of a __________.
 Definition
Germ Layer.
Term
The three different germ layers in Gastrulation are __________, __________, __________.
 Definition
Ectoderm; Endoderm; Mesoderm.
Term
The ectoderm forms the __________ and __________.
 Definition
Skin; Nervous System.
Term
The __________ forms the skin and nervous system.
 Definition
Ectoderm.
Term
The endoderm forms the __________ and assosciated organs.
 Definition
Gut.
Term
The __________ forms the gut and assosciated organs.
 Definition
Endoderm.
Term
The __________ layer forms last.
 Definition
Mesoderm.
Term
The __________ layer will form bones, muscles, veins, and body lining.
 Definition
Mesoderm.
Term
The top of the ectoderm forms the __________.
 Definition
Neural plate.
Term
The top of the __________ forms the neural plate.
 Definition
Ectoderm.
Term
The cells of the neural fold form a __________.
 Definition
Neural Tube.
Term
The cells of the __________ form the neural tube.
 Definition
Neural Fold.
Term
The neural tube formation occurs during __________ days.
 Definition
18-26
Term
The __________ formation occurs during 18-26 days.
 Definition
Neural Tube.
Term
The neural tube develops into the __________.
 Definition
Central Nervous System (Brain and Spine).
Term
The __________ develops into the Central Nervous System.
 Definition
Neural Tube.
Term
When a neural tube doesn't close, it can cause __________.
 Definition
Spina Bifida.
Term
__________ helps the neural tube close properly.
 Definition
Folic Acid.
Term
__________ include mollusks, annelids, and arthropods.
 Definition
Protostomes.
Term
In protostomes, the blastula becomes the __________.
 Definition
Mouth.
Term
In protostomes, the morula undergoes __________.
 Definition
Spiral Cleavage.
Term
__________ include chordates and echinoderms.
 Definition
Deuterostomes.
Term
In deuterostomes the blastopore becomes the __________.
 Definition
Anus.
Term
In Deuterostomes, the morula undergoes __________.
 Definition
Radial Cleavage.
Term
In __________ cleavage the cells rotate.
 Definition
Spiral.
Term
In __________ cleavage the cells are on top of each other.
 Definition
Radial.
Term
__________ have a body cavity.
 Definition
Coeloms.
Term
__________ don't have a body cavity.
 Definition
Acoelomates.
Term
__________ have somewhat of a body cavity.
 Definition
Pseudocoelomates.
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