Trend from dominant gametophytes to dominant sporophytes

Reference no: EM136557

Q. If intelligent extraterrestrials visited Earth 475 million years ago, and after that again 300 million years ago (at the close of the Carboniferous period), what trends would they have noticed in Earth's terrestrial vegetation over this period?

1. Trend from dominant gametophytes to dominant sporophytes

2. Trend from sporangia borne on modified leaves (sporophylls) to sporangia borne on stalks (seta)

3. Trend from no true leaves, to microphylls, to megaphylls

4. Trend from soil-surface-hugging plants to "overtopping" plants

5. Trend toward increased lignifications of conducting systems

Reference no: EM136557

Questions Cloud

Why did child become so upset : A young mother is encouraging her son to try another bite of a disliked food. The child is quietly whining, but when the mother spreads the food around to cool it, the child becomes hysterical. Why did child become so upset? Recognize the cognitive s..

What would doctor hypothesize about the probability : Medical history elicits the facts that she lost her husband six months previously, has been extremely depressed, and is taking sleeping pills and not eating properly. What would doctor hypothesize about the probability of senile dementia in this case..

What are chances of obtain long-haired yellow male : If a long-haired black male is crossed with a tortoise-shell female heterozygous for hair length what kind of kittens would be produced in the F1? If the F1 cats are allowed to generously interbreed among themselves, what are chances of obtain long-h..

How would this process result in purification of tubulin : How many grams of methane should be combusted to heat 1.30 of water from 24.0 to 92.0, assume as product and 100 percent efficiency in heat transfer.

Trend from dominant gametophytes to dominant sporophytes : What trends would they have noticed in Earth's terrestrial vegetation over this period.

How numerous bacteria were on the soap : A dog homozygous for both dominant traits is mated to a droopy-eared silent follower. The expected phenotypic ratio and genotypic ratio in the F-1 generation.

What limits the size of an animal : A form of vitamin D-resistant rickets, known as hypophosphatemia, is inherited as an x-linked dominant trait. If a male with hypophosphatemia, marries a normal female, which predictions concerning their potential progeny would be true.

This series of reaction is called : If you were asked to create a karyotype from the chromosome spreads you made from HeLa cells in Activity 4.2.1, list materials you would use and explain how you would make the karyotype.

How will the procedure result in purification of tubulin : GTP is again added to the redissolved pellet proteins, and the solution is again warmed for a few minutes. Then centrifugation at similar speed described above is again performed. This process is repeated several times.

User Account

All Pages