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Julli [10]
3 years ago
11

Pls help me.Am I right ?

Biology
2 answers:
stepan [7]3 years ago
4 0
Ummmm believe u r right
mr Goodwill [35]3 years ago
3 0
Yes, you are right. :)
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The cycads, a mostly tropical phylum of gymnosperms, evolved about 300 million years ago and were dominant forms during the age
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Answer:The Cycad tree is the sporophyte.They have flagellated sperm.

Explanation:

During pollination, the contents of the megaspore divide to form many–celled gamateophyte called the endosperm and archegonium. There is a micropyle opening with a sticky fluid, which traps the wind-borne male gametophyte (microspores) which,at this time is made up of prothallus cell;an antheridial cell and a large tube cell. The trapped microspore is sucked into the archegonia chamber. Antherizoids are released, but only one penetrates each oospore and fuses with the female nucleus. The zygote is formed in the ovule and the later develops into seed.The diploid seed germinates into a new sporophyte plant and the life cycle begins again. Examples of cycad include Cycas circinalis ,Cycas celebrical and Cycas revoluta

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A researcher wants to introduce the human gene encoding tissue plasminogen activator (used to dissolve blood clots) into a mamma
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In the given case, for the researcher to succeed, there is a need to place the gene next to the promoter sequence, which gets expressed in the mammary cells. The sequences of DNA, which illustrate that where the transcription of a gene by the RNA polymerase initiates is known as the promoter. These sequences are generally situated at the 5 prime terminals of the initiation site of transcription or are situated directly upstream.

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You discover a rare new bird species, but you are unable to observe its mating behavior. You see that the male is large and orna
Eva8 [605]

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You can conclude that the species is polygamous.

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How is specific gravity extracted from the earth?
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