Rice, wheat, soybeans, and ___ are considered the four angiosperms that are responsible for early agriculture. _ is a plant hormone associated with fruit ripening, rotting, and flowering but not with seed dormancy, germination, or growth. Many plants, such as trees, have complex chemical changes inside them that prepare them to go _ during the winter. The _ is the male structure in a plant that produces pollen. The _ is sticky and receives pollen from pollinators, to transfer to the ovaries. To protect their seeds and allow for dispersal, plants can develop _ to protect the seeds. Moisture and _____ determine many seeds' germination rates. What advantages do animal pollination bring to angiosperms that might explain the dominance of these relative newcomers among the plants?

8. Wind pollination required a great deal of excess pollen, just so some of it lands, by chance, in the right place. Animal pollination is more selective because animals pick pollen up and carry it directly to where it needs to be. Although there is still a chance that the pollen will be from the wrong plant species, plants can manipulate variations in animal behavior through the structures of their flowers, the time and season of flowering, or the rewards or attractive chemicals they produce to narrow the field of pollinators, and increase the chances of having exactly the right pollen put in exactly the right place.

Explanation:

kasliwalalvi24 kasliwalalvi24 · Answer 2 · 2022-01-05T11:16:02+01:00

The correct statements for the blanks are:

1. Rice, wheat, soybeans, and corn are considered the four angiosperms that are responsible for early agriculture. Angiosperms are flowering plants and were widely harvested in early agricultural practices.

2. Ethylene is a plant hormone associated with fruit ripening, rotting, and flowering but not with seed dormancy, germination, or growth. It is a multifunctional phytohormone, which depends on the concentration and time of application to regulate several processes in the plant.

3. Many plants, such as trees, have complex chemical changes inside them that prepare them to go dormant during the winter. Dormancy refers to the plants when preparing the soft tissues for freezing temperatures, nutrient shortage, and dry weather.

4. The anther is the male structure in a plant that produces pollen. The anther is the part of stamens, which stores the millions of pollen grains.

5. The stigma is sticky and receives pollen from pollinators, to transfer to the ovaries. Stigma is the upper part of the pistil, or female reproductive part, which receives the pollen grain for fertilization.

6. To protect their seeds and allow for dispersal, plants can develop fruits to protect the seeds. Fruits and seeds are the results of successful fertilization. The fruits are the ovary, which protects the seeds formed after fertilization.

7. Moisture and temperature determine many seeds' germination rates. the average temperature for seed germination is between 15 to 38-degrees Celcius.

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