What is distinct about the structure of gymnosperms pollen? How does this structure relate to the function of gymnosperms pollen grains? How might this relate to the fact that staminate cones are located at the tips of gymnosperms branches?

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Hubert KochLv2

3 Apr 2018

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Related questions

What is unusual about larch trees?

a. Their cones are extremely large compared to the size of the tree; a larch cone is typically more than 20 cm in diameter.

b. They are angiosperms that show convergent evolution with gymosperms; like many gymnosperms, they have modified leaves referred to as "needles."

c. The are coniferous trees that shed their needles (leaves) in the fall and regrow them in the spring.

d. They are angiosperms that produce cones instead of flowers and fruits.

bronzemammoth449

1. As you are walking through the woods with a friend, you notice some ferns growing along the path. When you stop to examine them, you note that there are brown bumps on the underside of the leaf, which you believe to be either some kind of fungal disease or insects. Your friend says that the bumps are normal. Who is correct? Explain

2. Describe where pollination and fertilization occur beginning with production of the pollen grains and ending with the sperm nuclei reaching the egg nucleus. Be specific and detailed.

3. How can someone tell if the pollen sacs are open? How would someone know if the stigma is mature? Be specific.

4. Seeds come from which part of the flower? Fruit is what part of the flower? The embryo comes from which part of the flower?

5. Explain how pine cones and strobili are different.