Nghĩa của từ gymnosperms bằng Tiếng Anh

noun

1

a plant that has seeds unprotected by an ovary or fruit. Gymnosperms include the conifers, cycads, and ginkgo.

Taxonomists can now say that the ferns' closest cousins are the seed plants - angiosperms (flowering plants) and gymnosperms (such as conifers).

Đặt câu với từ "gymnosperms"

1. Angiosperms are far more numerous than gymnosperms

2. As with gymnosperms, Angiosperms are heterosporous

3. Cryptogams are further classified into gymnosperms and angiosperms

4. Archegonia) the female sex organ of BRYOPHYTA, PTERIDOPHYTES and most GYMNOSPERMS

5. Archegonia) the female sex organ of BRYOPHYTA, PTERIDOPHYTES and most GYMNOSPERMS

6. An Archegonium also occurs in some gymnosperms, e.g., cycads and conifers

7. In gymnosperms, Archegonia are much-reduced structures embedded in megagametophytes

8. Agamospermy mainly takes place in gymnosperms to produce clonal seeds.

9. Many Angiosperm species use wind for pollination the way that gymnosperms do

10. There was, of course, a considerable overlap between the gymnosperms and angiosperms.

11. Gymnosperms except Angiosperms have both seed and fruits not just seeds

12. The male gamete of algae, some gymnosperms , and the non - seed - bearing plants.

13. Angiosperms evolved from gymnosperms and have been around for at least 202 million years

14. However, Archegonia in both gymnosperms and cryptograms produce a single egg cell.

15. Angiosperms comprise one of the two groups in the seed plants, the other group being gymnosperms

16. Archegonia) The multicellular flask-shaped female sex organ of bryophytes, clubmosses, horsetails, ferns, and many gymnosperms

17. Archegonium: A multicellular, often flask-shaped, egg-producing organ occurring in mosses, ferns, and most gymnosperms

18. The divergence of Angiosperms from gymnosperms occurred between 200 and 250 million years ago.

19. Antherozoid (spermatozoid) The motile male gamete of algae, fungi, bryophytes, clubmosses, horsetails, ferns, and certain gymnosperms. Antherozoids usually develop in an antheridium but in certain gymnosperms, such as Ginkgo and Cycas, they develop from a cell in the pollen tube

20. Antherozoid ( spermatozoid ) The male gamete of algae, some gymnosperms , and the non - seed - bearing plants.

21. Cycads (order Cycadales) are an ancient group of palmlike gymnosperms with about 300 extant species across three families

22. Aril, accessory covering of certain seeds that commonly develops from the seed stalk, found in both angiosperms and gymnosperms

23. ‘A great variation in endosperm size is observed within Angiosperms.’ ‘Simple trichomes are present on aerial surfaces of most Angiosperms and on some gymnosperms and bryophytes.’ ‘These data suggest that the enzyme is well conserved in plants and could play similar physiological roles in Angiosperms and gymnosperms.’

24. The Database provides information for all species and higher-ranked taxa of the gymnosperms, i.e., Conifers, cycads, ginkgo, and the gnetophytes.

25. Infrared spectra (4000...250 cm-1) of thin sections (12μm) of woods from some pored gymnosperms of the order Gnetales and of a non-pored angiosperm of the family Winteraceae have been obtained and found to resemble closely the spectra of typical angiosperms rather than gymnosperms.

26. Antheridia are reduced to form a pollen grain in both angiosperms and gymnosperms, being a single generative cell

27. The number of Cotyledons in the embryos of seeds of gymnosperms is highly variable, ranging from 8 to 20 or more.

28. Cycads are gymnosperms distinguished by crowns of large pinnately compound leaves and by cones typically borne at the ends of the branches

29. They consist of a protective coat containing several cells (up to 8 in gymnosperms, 2-3 in flowering plants).

30. The Cone, a distinguishing feature of pines and other conifers, is also found on all gymnosperms, on some club mosses, and on

31. Archegonia definition: a female sex organ, occurring in mosses , spore-bearing vascular plants, and gymnosperms Meaning, pronunciation, translations and examples

32. Archegonium definition: a female sex organ, occurring in mosses , spore-bearing vascular plants, and gymnosperms Meaning, pronunciation, translations and examples

33. Once the pollen grain lands on the stigma of a receptive flower (or a female cone in gymnosperms), it takes up water and germinates.

34. A female sex organ occurring in mosses, ferns, and most gymnosperms Familiarity information: Archegonium used as a noun is very rare.

35. While there are just over 1,000 species of gymnosperms, there are between 250,000 and 350,000 species of Angiosperms around the world

36. Both of these reproduced by spores rather than seeds and are considered to be links between ferns and the gymnosperms which evolved in the Triassic period.

37. Anemophily or wind pollination is a form of pollination whereby pollen is distributed by wind.Anemophilous plants may be either gymnosperms (non-flowering) or angiosperms (flower-producing)

38. Cycad plants are hardy, evergreen gymnosperms (cone-bearing plants) that grow in sand or hard rock. Cycads are dioecious plants; there are separate male and female plants

39. Archegonium - a female sex organ occurring in mosses, ferns, and most gymnosperms plant organ - a functional and structural unit of a plant or fungus Based on WordNet 3.0, Farlex clipart collection

40. Archegonium - a female sex organ occurring in mosses, ferns, and most gymnosperms plant organ - a functional and structural unit of a plant or fungus Based on WordNet 3.0, Farlex clipart collection

41. Majority of the local dicots withered and lost their leaves within two days after the storm, while other plants such as palms, cycads and gymnosperms retained their foliage but turned brown.

42. Anemophily or wind pollination is a form of pollination whereby pollen is distributed by wind. Almost all gymnosperms are anemophilous, as are many plants in the order Poales, including grasses, sedges and rushes

43. Natural fertilisers and artificial fertilisers, in particular fertilisers for monocotyledonous plants and dicotyledonous plants, as well as gymnosperms and angiosperms, NPK fertilisers, acetobacter, seaweed extracts, soil improving chemicals, manures

44. Natural manures and artificial manures,In particular fertilisers for monocotyledonous plants and dicotyledonous plants, as well as gymnosperms and angiosperms, NPK fertilisers, acetobacter, seaweed extracts (fertilisers), soil improving chemicals, manures

45. The gymnosperms include conifers, cycads, gnetales and ginkgos and these may have appeared as a result of a whole genome duplication event which took place about 319 million years ago.

46. Angiosperms and Gymnosperms are divided on the ground of kind of seeds they bear.Angiosperms are those whose seeds are covered inside the fruit.Gymnosperms seeds are called as naked seeds as they are exposed one

47. Angiosperms Although the Angiosperms are known as flowering plants, they are difficult to distinguish from gymnosperms solely on the basis of bearing flowers, for, like the strobilus, a flower is a compressed stem, with crowded spore-bearing appendages.

48. Members of the genus Cycas are called Cycads and although their more common name is Sago Palm, Cycas species are not palm trees (an angiosperm) but rather are ancient gymnosperms whose closest living relative is the ginkgo.

49. Angiosperm or Gymnosperm? When identifying trees, you will need to determine whether they are conifers or deciduous trees.--Gymnosperms are a taxonomic class that includes plants whose seeds are not enclosed in an ovule (like a pine cone)

50. The flowering plants, or Angiosperms (Greek angio, vessel + sperm, seed; i.e., seeds enclosed by a vessel), variously named Angiospermae, Magnoliophyta, or Anthophyta, are a monophyletic group currently thought to be the sister group to the gymnosperms.