Q: How many cellular nuclei the pollen tube of angiosperms have? What is the ploidy of each of these…
A: The pollen type or the male gametophyte of angiosperms have three nuclei Two sperm nuclei One tube…
Q: One of the major phylogenetic conclusions of this study is: choose one a. The Ginkgoales…
A: Answer : d. The Gnetales are the sister group to angiosperms among extant gymnosperms.
Q: The presence of vascular tissue allows a plant to grow much larger than its gametophyte counterpart.…
A: The evolution of plants occurred in multiple stages. The terrestrial plants were evolved from…
Q: Considering the trends in floral evolution, how do you think these changes contribute in ensuring…
A: The majority of insect-pollinated flowers are large, colourful, fragrant and rich in nectar, when…
Q: The seed that develop post-fertilisation are not covered in gymnosperms why?
A: All plants come under the kingdom Plantae. They are eukaryotes, multicellular, and having cell…
Q: Plants and animals originated in water environments and, much later, plants invaded the land and…
A: Fertilization is the process of fusion of male and female gametes which results in the formation of…
Q: Do all flowers have all of the structures illustratedhere?
A: Answer- The typical angiosperm flower have 4 main structures that are- Calyx- Sepals Corolla-…
Q: Based on the diversity of forms in fruits, what is the primary function of the fruit?
A: Fruits are found in many diverse forms. The primary functions of the fruit are: Protection of the…
Q: Name 4 different evolutionary adaptations that allowed plants to survive on land instead of in…
A: Evolutionary adaptation, or simply adaptation, is the process through which organisms adapt to their…
Q: What is the evolutionary importance of the fruits for the angiosperms?
A: Fruits are the mature ovaries of angiosperms. After fertilization, ovules are transformed into seeds…
Q: Over the course of plant evolution, there has been an increasing dominance ofa. the gametophyte…
A: Most primitive plants are bryophytes which then evolved to form vascular plants of two types i.e.…
Q: Double fertilization evolved independently in gnetophytes and in flowering plants. Name two other…
A: Fertilization is a sexual reproduction process in plants wherein the male gamete that is pollen…
Q: A seed contains what? O spores O gametes O a baby gametophyte O a baby sporophyte
A: Plants are organisms with eukaryotic cells having cell walls and are capable of synthesizing their…
Q: Are gymnosperms heterosporous or homosporous? Explain what this means. What are the evolutionary…
A: All seedless plants are homosporous because they produce a single kind of spore (Bisexual…
Q: Ginkgo and cycads have broad leaves, whereas those of pines are needlelike. Can you suggest any…
A: Gingko, cycads, and pines are all examples of gymnosperms. They are often considered to be living…
Q: Are gymnosperms heterosporous or homosporous? Explain what this means. What are the evolutionary…
A: Plants are organisms with eukaryotic cells having cell walls and are capable of synthesizing their…
Q: Most flowers contain both male and female reproductive structures, in contrast to the cones of…
A: To answer this question we must have knowledge about plant kingdom.
Q: The following evolutionary trends are seen in the seedless land plants. a. Gametophytes became…
A: Evolution is the process by which an organism inherits or adapts favourable characteristics that…
Q: Angiosperms (flower-bearing) plants developed after gymnosperms (cone-bearing) plants during the…
A: Angiosperms are flower-bearing plants and are found almost everywhere. They play an important role…
Q: working in the field, you discover a fossil of a previously undescribed plant species. the specimen…
A: Fossils help to predict the nearest predecessor and investigate evolution. They can help in…
Q: Explain why angiosperm wood is considered to be evolutionary more advanced than the gymnosperms…
A: Introduction Gymnosperm is any vascular plant that reproduces by means of an exposed seed, or ovule…
Q: What can you say about an early interpretation or hypothesis that the gnetophytes are probably the…
A: Taxonomy is the branch of biology concerned with the placement (of a new creature into an existing…
Q: what evolutionary advantage does double fertilization provide angiosperms over gymnosperms?
A: Double fertilization is a fertilization mechanism of flowering plants.
Q: On what are plant embryos dependent? Select one: a. Water for pollination b. Nutrients provided…
A: Plant embryo can be defined as part of the seed, or the bud comprises immature or primary forms of…
Q: What role can the pappus play in seed dispersal?
A: The movement, dispersal, or transfer of seeds away from the original plant is referred to as seed…
Q: Which of the following statements is accurate? a) All plants have identical sporangia, all producing…
A: Both the haploid and diploid phases of plants are multicellular.
Q: Which of the following is the role of iron in plants? A. endosperm development and dehydrogenase…
A: Iron is a crucial element of electron networks and a cofactor in a number of important enzymes. Just…
Q: While surveying plants in the jungles of Borneo, you come across a flowering plant that you have…
A: Note: As Per Guidelines, We Can Answer One Question At A Time. Ask Again To get rest answers.…
Q: The seed coat formes from the Select one: O A. the haploid antipodal cells O B. the diploid…
A: Seed is the diploid structure. It is found in the gymnosperms and angiosperms. The parts of a seed…
Q: A new "plant" is found to lack vascular tissue, have a dominant gametophyte generation, and swimming…
A: Plants are the autotrophic organisms that are capable of synthesizing their own food with the help…
Q: What two groups of plants produce seeds? O a. Gymonsperms and Angiosperms O b. Broyophytes and…
A: Ans: The plants which belongs to spermatophytes also referred to as phanerogams or phaenogams…
Q: Are gymnosperms heterosporous or homosporous? Explain what this means. What are the evolutionary…
A: Gymnosperm, or any artificial plant that reproduces sperm, or ovule — unlike angiosperm, or…
Q: Gymnosperms and angiosperms have the following incommon except(A) seeds.(B) pollen.(C) ovaries.(D)…
A: Plants are multicellular organisms in the kingdom Plantae. Plants use the process of photosynthesis…
Q: the evolutionary advantage of seed, pollen, flowers, and fruit?
A: Seed is the part of the plant that contains the growing embryo that can transform into the whole…
Q: What is the main difference between angiosperms and gymnosperms in terms of where the seeds are…
A: Angiosperms are also known as flowering plants. Gymnosperms are flowerless plants that produce cones…
Q: Early botanists admired ferns but found their life cycle perplexing. In the 1700s, they learned to…
A: Ferns are well known and stated that they re been vascular plants that do not produce seeds. Ferns…
Q: What features not present in seedless plants have contributed to the enormous success of seed plants…
A: The seedless plants are algae, bryophyte and pteridophytes. The seed bearing plants are gymnosperm…
Q: Double fertilization in flowering plants occurs by two sperms that fertilize: O polar nuclei and egg…
A: Double fertilisation is the special feature found in angiosperm. The flower is the characteristic…
Q: Why does endosperm development precede embryo development
A: The endosperm is a tissue that is produced after the process of double fertilization inside the…
Q: 2. Describe the transition from an ovary/ovule to a fruit.
A: Fertilization in flowering plants is termed double fertilization which involves two male nuclei in…
Q: In what three ways does reproduction in the angiosperms differ from that of the gymnosperm?
A: The process by which the plants produce new offspring is called reproduction. Plants reproduce…
Q: The portion of an embryonic axis that above where the cotyledons are attached and below the first…
A: In plants zygote is produced by the fusion of male and female gamete. This zygote undergoes certain…
Q: Mention three adaptive advantages of the seed. 8. Besides the seed, what other structure is a…
A: Seeds contain a diploid embryo which upon germination produce sporophyte. Seeds live in a state of…
Q: Which of the following statements is correct? A. Double fertilization is unique to seed plants B.…
A: Since you have posted multiple questions, we are instructed to answer the first one. If you want a…
Q: During fertilization in flowering plants, one sperm cell nucleus fuses with the egg nucleus,…
A: The gymnosperms, also known as Acrogymnospermae. They produce seeds without covering. So, they are…
Q: Both gymnosperms and angiosperms bear seeds, then why are they classified separately?
A: Gymnosperms are non-flowering plants and angiosperms are flowering plants. For example, plants like…
Q: You have discovered a new plant species that you think may be a gymnosperm. Which of the following…
A: Gymnosperms means naked seed so the gymnosperms are the group of plant which seeds don't have any…
The female gametophyte in flowering plants is also called the (a) polar nuclei (b) anther (c) embryo sac (d) endosperm (e) sporophyll
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- Which of the following is not a characteristic that distinguishesgymnosperms and angiosperms from other plants?(A) dependent gametophytes(B) ovules(C) pollen(D) alternation of generationsWhere in an angiosperm would you finda megasporangium?(A) in the style of a flower(B) enclosed in the stigma of a flower(C) within an ovule contained within an ovaryof a flower(D) packed into pollen sacs within the anthers found on astamenIn plant life cycles, (a) the first products of meiosis are gametes (b) spores are part of the diploid sporophyte generation (c) the embryo gives rise to a zygote (d) the first stage in the diploid sporophyte generation is the zygote (e) the first stage in the haploid gametophyte generation is the prothallus
- The immature male gametophytes of pine are called (a) ovules (b) stamens (c) seed cones (d) pollen grains (e) polar nucleiSeed plants lack which of the following structure(s)? (a) ovules surrounded by integuments (b) microspores and megaspores (c) vascular tissues (d) a large, nutritionally independent sporophyte (e) a large, nutritionally independentgametophyteMotile sperm cells are found as vestiges in these two gymnosperm groups: (a) monocots, eudicots (b) gnetophytes, conifers (c) gnetophytes, flowering plants (d) cycads, conifers (e) cycads, ginkgo
- The cells of endosperm have 24 chromosomes. What will be the number of chromosomes in the gametes ? (a) 8 (b) 16 (c) 23 (d) 32Which of the following is not a characteristic of plants? (a) cuticle (b) unicellular gametangia (c) stomata (d) multicellular embryo (e) alternation of generationsWhat is the function of filiform apparatus in an angiospermic embryo sac? (a) Brings about opening of the pollen tube (b) Guides the pollen tube into a synergid (c) Prevents entry of more than one pollen tube into a synergid (d) None of these
- Gymnosperms and angiosperms have the following incommon except(A) seeds.(B) pollen.(C) ovaries.(D) ovules.In which part of the flower does both meiosis and fertilization occur? (A) anther (B) filament (C) ovule (D) stigma11. The scales of pine cones are (a) always green. (b) modified roots. (c) modified leaves. (d) modified stems. 12. Plants that make flowers are called (a) gymnosperms. (b) byrophytes. (c) gametophytes. (d) angiosperms. 13. The class of plants that has vascular tissue and reproduces with spores is the (a) clubmosses. (b) liverworts. (c) flowering plants. (d) conifers. 14. The embryonic stem in a seed is called the (a) radicle. (b) hypocotyl. (c) seed cont. (d) endosperm. 15. Pollen contains (a) male gametes. (b) female gametes. (c) fruits. (d) a stigma.