Question

Какие утверждение верные. 1.голосемяные растения-исключительно деревья 2.хвоя ели длинная,на побегах по 2 игловидных листа 3.мужские шишки сосны имеют желтоватый цвет. 4.хвойные-однодомные растения.

Answer 1

Are the following statements true?

1. Gymnosperms are exclusively trees. 2. The needles of fir trees have two needle-like leaves on each shoot. 3. Male pine cones have a yellowish color. 4. Conifers are monoecious plants.

Let's examine each statement one by one:

1. Gymnosperms are a group of plants that include both trees and non-tree forms. While many gymnosperms are indeed trees, there are also gymnosperms that are shrubs or even herbaceous plants. Therefore, the statement that gymnosperms are exclusively trees is not true. [[1]]

2. Fir trees, which belong to the genus Abies, have needles that are usually arranged singly on the shoots. Each needle is attached directly to the stem without any pairs or clusters. Therefore, the statement that fir needles have two needle-like leaves on each shoot is not true. [[2]]

3. Male pine cones, also known as pollen cones, typically have a yellowish color. These cones produce pollen, which is released to fertilize the female cones. So, the statement that male pine cones have a yellowish color is true. [[3]]

4. Conifers are a group of plants that belong to the division Pinophyta. They are characterized by having cones and needle-like or scale-like leaves. Conifers can be either monoecious or dioecious. Monoecious conifers have separate male and female reproductive structures on the same plant, while dioecious conifers have male and female reproductive structures on separate plants. Therefore, the statement that conifers are monoecious plants is not always true. Some conifers are monoecious, while others are dioecious. [[4]]

In summary: - Statement 1 is not true. - Statement 2 is not true. - Statement 3 is true. - Statement 4 is not always true.

Please let me know if you have any further questions!