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Definition
| it is the generation that bears flowers |
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| A flower, which is the reproductive structure of angiosperms, produces two types of spores by meiosis Microspores and Megaspores |
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Definition
| a male gametophyte, which is either windblown or carried by animal to the vicinity of the female gametophyte |
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Term
| list of the anatomy of the flower |
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Definition
1) stalk; peduncle
2) sepals; green cover leaf, also called a calyx
3) petals, also called a corolla
4) stamen (male)
-anther
-filament
5)carpel (felmale)
-stigma
-style
-ovary
-ovule
6) receptical |
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Term
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Definition
| as one species changes, the other changes too |
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Definition
| a nutritive tissue that the developing enbryonic sporophyte will use as an enerygy source |
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Term
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Definition
comes from the ovule wall
a mature seed contains
1) the embryo
2) stored food
3)the seed coat |
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Term
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Definition
| results in not only a zygote but also a food source for the developing zygote |
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Term
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Definition
can have as many as 3 layers
exocarp
mesocarp
endocarp |
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Term
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Definition
splits along two sides when mature
pea pod |
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Term
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Definition
does not split
maple tree |
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Term
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Definition
| peaches have a hard srony endocarp and are often, therefore, called stone fruits, although botanically they are known as drupes |
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Definition
| monocaots have flower parts usually in threes |
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Definition
| have flower pares in fours of fives |
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Term
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Definition
are fruits that form from other flower parts, in addition to the ovary
strawberry
many different carples |
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Term
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Definition
| a raspberry is an example of an aggregate fruit because the flower had many seperate carpels |
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Term
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Definition
| pineapples, which is derived from many individual flowers, each with fruit combines into a single larger fruit |
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Term
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Definition
| A single parent gives rise to offsprings that are identical to the parent, unless mutations occur |
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Term
| 3 types of Asexual reproduction |
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Definition
- sponge is very primitive (gemmules)
- hydras, (budding)
- echinodemms (fragment) |
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Term
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Definition
| ufertilized eggs develop into complete bu haploid individuals which is not disadvantageous as long as they are adapted to the present enviroment |
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Term
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Definition
egg of one parent is fertilized by sperm
offspring is different form both parents
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Term
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Definition
| The union of male and female |
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Term
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Definition
| The union of sperm and egg |
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Definition
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Term
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Definition
Serve the needs of the embryo to prevent drying out
One membrane surrounds an abundant supply of yolk, which is a nutrient rich material
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Term
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Definition
offspring develop inside the females body untill they can live independently
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Term
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Definition
| Ovuliparity : fecundation(fertilisation) is external (in arthropods and fishes, most of frogs) |
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Term
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Definition
| fecundation is internal, the female lays zygotes as eggs with important vitellus (typically birds) |
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Term
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Definition
| has two different meanings. In animals, it means development of the embryo inside the body of the mother, eventually leading to live birth, as opposed to laying eggs. In plants, it means reproduction via embryos, such as buds, that develop from the outset without interruption, as opposed to germinating externally from a seed. |
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Term
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Definition
1) Anterior pituitary.(produces)
Follicle-stimulating hormone FSH
2) FSH promotes development of a follicle
3) Follicle secrets two hormones
estrogen and progesterone
4) estrogen does two things
~tells anterior pituitary to stop producing FSH
~tells hypothalamas to produce GnRH
5) gonadotropic-releasing hormone GnRH tells anterior pituitary to start making luteinizing hormone LH
6) LH does two things
~ starts ovulation
~ promotes the development of the courpus luteum
7) courpus luteum secrets progesterone
~ as levels of progesterone rise the anterior pituitarty hults secretion of LH and the corpus luteum begins to degenerate.
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