Male gametophytes and male gametes form in angiosperm
How male gametophytes and male gametes formed in the angiosperms?
Expert
In the anthers of each stamen there are pollen sacs. In the pollen sacs there are microspore mother cells, micro-sporocytes. These cells undergo meiosis forming the microspores. Each microspore by the mitosis forms a pollen grain having one generative cell and one tube cell. The pollen grain is male gametophyte.
When pollination takes place and the pollen grain creates contact with stigma (the apex of pistil) the tube cell elongates its cytoplasm forming pollen tube which grows towards the ovary. The generative cell divides forming two sperm nuclei (or male gametes) which migrate through pollen tube.
Write the major types of animal tissue? Answer: The major animal cell tissues are: nervous tissue, epithelial tissue, muscle tissue and the connective tissue.
What is LeadershipA) Some common themes within definitions of leadership: leadership is an influencing process; leaders need followers an unequal power distribution; leadership occurs when trying to achieve certain objectives
Define the term microbiology. Briefly define it.
How is the finding of ribosome within mitochondria and chloroplasts described?
In high altitudes is it compulsory for the blood to contain less or more hemoglobin?
Write down the similarities and differentiations between the transcription procedure and the replication procedures?
What do you mean by the term CSF?
Write down a short note on the dissimilarity between phloem and xylem.
What is the main function of bone marrow?
Into which two classes can the nitrogen having bases which form RNA and DNA be categorized? What is the criterion employed in that categorization?
18,76,764
1950603 Asked
3,689
Active Tutors
1444280
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!