Two factors contributed to the success of the pteridophytes: the extreme miniaturization of the gametophytic generation and an important development of the sporophytic generation (development of the tree forms).
Pteridophytes are a group of plants that peaked in the Carboniferous (-300 million years). It is the first great terrestrial plant civilization. These plants would have appeared in the Devonian -400 million years ago, perhaps from certain primitive terrestrial plants which, unlike bryophytes, would have favored the diploid generation on the haploid generation.
Particularly well adapted to terrestrial life, they have created, thanks to the development of tree forms, immense forests whose fossilization is at the origin of coal deposits.
Pteridophytes are at the origin of an evolutionary lineage based on the extreme miniaturization of gametophytic generation and an important development of sporophytic generation, leading to all tracheophytes including current flowering plants. Pteridophytes are well adapted to terrestrial life, however fertilization still requires the presence of water since male gametes are swimmers.
Answer:
A. Specialized cells are made up of tissues
Explanation:
Cells make up tissues, tissues make up organs, organs make up organ systems and organ systems make up an organism.
All the other options are correct, but cells are not made up of tissues.
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Answer:
The marginal cost of increasing production from 5,000 units to 6,000 would be $1,000 / 500.
Explanation:
Answer:
B. Replaces injured tissues with connective tissue
Explanation:
Inflammatory responses are natural defense mechanism of body of higher organisms which have been evolved to protect the organism from various types of infections and injuries. The main function of his response is to -
- Localize the injury so that it will not spread to the other parts of the body
- Eliminate the injurious agents to prevent further increase in the infection inside the body
- Remove the damaged tissue of the body so that it can start the mechanism of tissue healing
Thus, all the functions of the inflammatory responses that are mentioned in the options are correct except option B.
I Think The answer is d I hope it helps just Trying To help The best I can
