Asexual vs Sexual Reproduction

Transcription

1 Asexual vs Sexual Reproduction 1. Reproduction in plants can be either: or. Sexual Reproduction 2. Sexual reproduction is when the union of the and produce a (or ). - = female sex cell - = male sex cell - = an immature plant 3. (True or False) Sexual reproduction involves the creation of a genetically new individual. 4. Seedless plants (such as mosses and liverworts) rely on to allow the sperm to swim to the egg of the female seedless plant. 5. List two ways seed plants can transfer pollen: a) b) 6. During fertilization, the egg cell and sperm cell combine to create a, or fertilized egg. 7. (True or False) Most plants undergo sexual reproduction. Asexual Reproduction 8. (True or False) Plants do not need flowers to reproduce. 9. What can be used to grow a new plant? 10. Asexual reproduction involves the creation of a genetically plant. 11. Three structures plants use to reproduce are: A) tiny plants grow along the edges of a plant's leaves, fall off, and grow on their own. B) are underground stems that can produce plants after a dormant season C) are above- ground stems from which new plants can grow

2 Sexual or Asexual? Read each scenario below and tell if it is describing sexual or asexual reproduction. 1. A strawberry plant has been growing for three seasons. It sends runners along the ground. These runners take root and produce new strawberry plants. 2. The DNA of a bacterium doubles. The cell divides in half in a process called fission. This process continues every 20 minutes until food for bacteria becomes scarce. 3. A yeast cell stretches its outer shell until a bump or bud appears. The genetic material divides in half and part of this material goes into the bud. The bud pinches in until it breaks. 4. Two gametes from protozoans come together or fuse. This fusion forms a zygote. 5. The egg from a female dog is fertilized by the sperm of a male dog. This produces a fertilized egg. 6. Pollen from a pine tree is released into the air when the wind blows. Some of the pollen is trapped in the seed cone of the pine. A year after pollination a winged seed is released. 7. A Euglena has reached its maximum size. The nucleus of the Euglena reproduces the DNA and then divides in half. The rest of the Euglena divides along its length. 8. An avid rose gardener collects pollen from his prize red rose and deposits this pollen on the stigma of another rose. He has hopes of a new rose that he can name after his wife. 9. A female perch has a long strand of eggs along the river bottom. A male deposits milt, a fluid containing sperm, over the eggs. 10. A careless diver hits a sponge with his flippers. The piece that was broken off grows back into an entirely new sponge through the process of regeneration. 11. Mrs. Thomas is planting her garden in the spring. She has several large potatoes. She cuts each potato so that the pieces have an eye. She plants the eye pieces in her garden. Later, she has many large potatoes.

3 Asexual vs Sexual Reproduction (B) 1. Reproduction in plants can be either: or. Sexual Reproduction 2. - female sex cellsare called (ovule? Or pollen?) - male sex cells are called (ovule? Or pollen?) 3. (True? or False?) Sexual reproduction involves the creation of a genetically new individual. 4. Seedless plants (such as mosses and liverworts) rely on (water? Or wind?) to allow the sperm to swim to the egg of the female seedless plant. 5. List two ways seed plants can transfer pollen: a) b) 6. During fertilization, the egg cell and sperm cell combine to create a (zygote? Or ovule?) which is also known as a fertilized egg. 7. (True? or False?) Most plants undergo sexual reproduction. Asexual Reproduction 8. (True? or False?) Plants do not need flowers to reproduce. 10. Asexual reproduction involves the creation of a genetically (different? Or identical?) plant.

4 Sexual or Asexual? Read each scenario below and tell if it is describing sexual or asexual reproduction. 1. A strawberry plant has been growing for three seasons. It sends runners along the ground. These runners take root and produce new strawberry plants. 2. The DNA of a bacterium doubles. The cell divides in half in a process called fission. This process continues every 20 minutes until food for bacteria becomes scarce. 3. A yeast cell stretches its outer shell until a bump or bud appears. The genetic material divides in half and part of this material goes into the bud. The bud pinches in until it breaks. 4. Two gametes from protozoans come together or fuse. This fusion forms a zygote. 5. The egg from a female dog is fertilized by the sperm of a male dog. This produces a fertilized egg. 6. Pollen from a pine tree is released into the air when the wind blows. Some of the pollen is trapped in the seed cone of the pine. A year after pollination a winged seed is released. 7. A Euglena has reached its maximum size. The nucleus of the Euglena reproduces the DNA and then divides in half. The rest of the Euglena divides along its length. 8. An avid rose gardener collects pollen from his prize red rose and deposits this pollen on the stigma of another rose. He has hopes of a new rose that he can name after his wife. 9. A female perch has a long strand of eggs along the river bottom. A male deposits milt, a fluid containing sperm, over the eggs. 10. A careless diver hits a sponge with his flippers. The piece that was broken off grows back into an entirely new sponge through the process of regeneration. 11. Mrs. Thomas is planting her garden in the spring. She has several large potatoes. She cuts each potato so that the pieces have an eye. She plants the eye pieces in her garden. Later, she has many large potatoes.

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