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Why do plants need sunlight?

Why do plants need sunlight?. How do plants get what they need?. What reaction is this?. If plants use oxygen, why do they release it to the atmosphere?. Which traits evolved first in land plants?. Where did plants likely evolve?

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Why do plants need sunlight?

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  1. Why do plants need sunlight? How do plants get what they need? What reaction is this?

  2. If plants use oxygen, why do they release it to the atmosphere?

  3. Which traits evolved first in land plants? Where did plants likely evolve? The oldest plant ancestor is most likely related to what living group of plants? What did plants need to do to move onto land? How would life on Earth be different if plants had never moved to the land?

  4. What is this called? What are two differences between the sporophyte and the gametophyte? - reproduction - chromosomes (haploid, diploid)

  5. Where would green algae not be found? How are green algae like plants? How are green algae not like plants? Why would green algae sometimes reproduce asexually? Why would green algae sometimes reproduce sexually?

  6. Which is the dominant phase, the sporophyte or gametophyte? Explain. Why are bryophytes like this moss linked to water? In what habitat would mosses not be successful?

  7. Which is the dominant phase, the sporophyte or gametophyte? Explain. Why are tracheophytes no longer linked to water? What has happened to the relative size of the sporophyte and gametophyte?

  8. What kind of plant is a moss? Why do these plants remain small (low growing)? - 2 reasons What is the root-like structure? What is the spore case? What is the sperm-producing part? What is the egg producing part? What is a fertilized egg? What does it grow into?

  9. What is vascular tissue? What do we call a plant with vascular tissue? How does it help a plant grow tall? - 2 ways? What is xylem? What is phloem? What is lignin?

  10. What is a big advantage in the evolution of seed plants? What is the advantage of seed dormancy?

  11. What is a difference between an angiosperm and a gymnosperm? What is a difference in the pollination of an angiosperm and a gymnosperm? Where are the sperm and eggs produced in each?

  12. What is the difference between pollination and fertilization? What is unusual about double fertilization? How is it an advantage? Give two methods of pollination. Which is more efficient and why?

  13. What captures light? What anchors the plant and absorbs water? What supports the plant, gets it closer to the light and transports materials between roots and leaves?

  14. What tissue is the growth region? • What protects the growth region, and why? • Where is food stored? • Where is water and phloem transported? • What is the outer covering? • What is the inner skin? • What makes up the vascular cylinder?

  15. What is the difference between primary and secondary growth? What creates tree rings, and what do they indicate?

  16. What are these? What are the xylem and phloem in these pictures called? How is the arrangement of xylem and phloem different?

  17. What is unusual about the saguaro? 2 things

  18. What does a thin tree ring mean? What is heartwood? What is sapwood? What does a tree ring indicate?

  19. Where does most photosynthesis occur? • Where does gas exchange occur? • How is the blade well suited for the leaf’s function? 4. Where would most chloroplasts be found? 5. Through what does transpiration occur?

  20. When is the stomata open? Closed? Why are most stomata found on the underside of the leaf? What happens to transpiration when the stomata are open? Closed? What will the closing of the stomata do to the movement of water through a plant?

  21. What is the name for the process of movement of sugar in a plant? What is the place where a sugar is made? What is the place where a sugar is stored?

  22. What are the 3 female parts? What are the 2 male parts? Where are pollen grains produced? What describes seeds and fruit? How is a fruit related to an ovary?

  23. When does grafting work best? 2 things

  24. What is the difference in vegetative propagation and double fertilization? When is each advantageous or disadvantageous? What two things are produced by double fertilization?

  25. What is seed dispersal? How are the seeds below dispersed? How do you know?

  26. What is an apical meristem? What happens to a plant when the apical meristem is present? When it is removed?

  27. What happens to the seed coat to initiate germination? How do the plants know to bend toward the ground?

  28. What is this movement called? What hormone causes this?

  29. What is this movement called? What is the importance of this movement?

  30. What chemical causes fruit to ripen? Where is this chemical produced? What chemical causes fruits and stems to grow?

  31. What are the plants in this graphic responding to? What pigment lets a plant know the length of day/night?

  32. What process created all these varieties of plants?

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