Why are bryophytes considered incompletely liberated from their ancestral?
They grow at the most places and compulsorly require water or moisture for the fertilisation. The motile male gametes move to the destination by the help of flagella, simiilar to the quatic plants. So, it is considered that the Bryophtes have not completely relieved from the aquatic nature of their ancestors.
Why are bryophytes still dependent on their ancestral aquatic habitat?
Bryophytes may have been successful at the transition from an aquatic habitat to land, but they are still dependent on water for reproduction and absorb moisture and nutrients through the gametophyte surface.
Are ferns seedless vascular plants?
Ferns are considered the most advanced seedless vascular plants and display characteristics commonly observed in seed plants. Ferns form large leaves and branching roots. In contrast, whisk ferns, the psilophytes, lack both roots and leaves, which were probably lost by evolutionary reduction.
Why are ferns considered incompletely adapted to the terrestrial environment when compared with other plants quizlet?
Why are ferns considered incompletely adapted to the terrestrial environment, when compared with other plants? Their sperm are flagellated and require water for fertilization. They lack gametangia.
Which of the following traits was most important in enabling the first plants to move onto land?
Which of the following traits was most important in enabling the first plants to move onto land? the development of sporopollenin to prevent the desiccation of zygotes.
Why bryophytes rarely succeed in the ecosystem?
The lack of lignin and reliance on external water conduction restrict the stature of bryophytes and their ability to compete for light with larger plants. Consequently, many bryophytes succeed in habitats not easily colonized by vascular plants like rock and other hard substrates, tree bark, and in deep organic soils.
What adaptations do bryophytes have for their particular habitats?
Instead, bryophytes can absorb water over their whole surface, eliminating the need for a vascular system. In addition, flowers and nectar are not necessary for reproduction in these plants, because the gametes they produce are designed to travel through the water.
Why do bryophytes usually live in aquatic or moist environment?
Bryophytes can be found in wet environments all around the world. Because they have no vascular tissue, they aren't able to take water from the soil and transport it to higher tissue. Bryophytes need wet and often well shaded environments which deliver a lot of rain water for them to soak up.
What is the habitat of bryophytes?
Bryophytes thrive in damp, shady environments, but they can also be found in diverse and even extreme habitats, from deserts to arctic areas. Globally there are around 11,000 moss species, 7,000 liverworts and 220 hornworts. As they are not flowering plants, bryophytes reproduce by spores instead of seeds.
Which of these adaptations to a terrestrial existence evolved most recently?
30 Cards in this Set
| What is pollen? | a male gametophyte |
|---|---|
| Which of these adaptations to a terrestrial existence evolved most recently? a) stomata b) gametangia c) seeds d) cuticle e) vascular tissue | seeds |
| Madagascar is an island in the ____ Ocean. | Indian |
| Fungal mycelia are composed of _____. | hyphae |
Why does it make sense that many fruits are green when their seeds are immature group of answer choices?
Why does it make sense that many fruits are green when their seeds are immature? They are harder to see and thus less likely to be eaten than other fruits.
How does the life cycle of bryophytes differ from all of the other major groups of land plants?
Bryophytes lack true vascular system, i.e. xylem and phloem. Vascular plants have true xylem and phloem. Alternation of generations of sporophytic and gametophytic generation occurs in both. In Bryophytes, main plant is gametophyte and sporophyte is reduced and parasitic on gametophyte, whether complete or partial.
Which statement about bryophytes is correct?
Out of the statement given for the bryophytes, the only correct statement given for the bryophytes, the only correct statement is that they can live in soil, but are dependent on water for sexual reproduction. Thus, are called amphibians of plant kingdom.
Why are bryophytes restricted to moist or wet habitat?
Bryophytes also need a moist environment to reproduce. Their flagellated sperm must swim through water to reach the egg. So mosses and liverworts are restricted to moist habitats.
Why do bryophytes still need to live near water?
Bryophytes are still tied to water because they are nonvascular and thus don't have vascular tissue to transport water and nutrients. Because of this, they are usually found in moist locations.
Are bryophytes aquatic?
Many bryophytes are found in association with freshwater but there are no marine bryophytes. A few species are found in brackish water.
Why do you think gymnosperms might be considered more successful than ferns in various terrestrial habitats is that necessarily true?
Compared to ferns, gymnosperms have three additional adaptations that make survival in diverse land habitats possible. These adaptations include an even smaller gametophyte, pollen, and the seed. Gymnosperms are plants that bear seeds that are "naked," meaning not enclosed in an ovary.
Which of the following does not occur in plants that produce seeds covered with fruit wall?
Gymnosperms do not produce fruits. >>Gymnosperms do not produce fruits.
Why are the bryophytes considered as the first land plants?
Between 510 – 630 million years ago, however, land plants evolved from aquatic plants, specifically green algae. Molecular phylogenetic studies conclude that bryophytes are the earliest diverging lineages of the extant land plants. They provide insights into the migration of plants from aquatic environments to land.
Which one of the following bryophyte is aquatic?
The correct answer is Riccia fluitans. It is the collective term for mosses, hornworts and liverworts.
Which of the characteristic is true about bryophytes?
Bryophytes are autorophic as they contain chloroplast. The leafy green plant is really the gametophyte, which is the dominant stage in all Bryophytes. The sporophytes do not have a free-living existence.
Why bryophytes are unsuccessful?
The bryophytes, on the other hand, do not possess all these characters of land plants. Moreover, the successful land plants produce seeds for their survival and multiplication. Therefore, the bryophytes could not become successful land plants.
Why are these plants like most bryophytes restricted to moist habitats and why are they always small?
Bryophytes also need a moist environment to reproduce. Their flagellated sperm must swim through water to reach the egg. So mosses and liverworts are restricted to moist habitats.
Why the gymnosperms are said to be better adapted to terrestrial than the ferns?
Compared to ferns, gymnosperms have three additional adaptations that make survival in diverse land habitats possible. These adaptations include an even smaller gametophyte, pollen, and the seed. Gymnosperms are plants that bear seeds that are "naked," meaning not enclosed in an ovary.
How do fern plants reproduce when conditions are harsh and there is lack of water in the environment?
Ferns do not flower but reproduce sexually from spores. There are two distinct stages of the fern life cycle. Mature plants produce spores on the underside of the leaves. When these germinate they grow into small heart-shaped plants known as prothalli.
Which of the following plant groups produce seeds but not flowers bryophytes gymnosperms Pteridophytes ferns?
Gymnosperms have exposed seeds and do not flower or fruit.
Which one of the following plants produces seed but no fruit?
Thus, Gymnosperms are the plants that form seeds but not fruits.
Are bryophytes aquatic or terrestrial?
Molecular phylogenetic studies conclude that bryophytes are the earliest diverging lineages of the extant land plants. They provide insights into the migration of plants from aquatic environments to land. A number of physical features link bryophytes to both land plants and aquatic plants.
What limits the success of bryophytes on land?
Because they have no vascular tissue, they aren't able to take water from the soil and transport it to higher tissue.
Why are these plants like most bryophytes restricted to moist habitats and why are they always small quizlet?
Bryophyta- Mosses: Why are these plants, like most bryophytes, restricted to moist habitats? They cant survive in dry areas because there is no water. Lacks cuticles and need water in order to perform fertilization.