In angiosperms, pollen grains are
A. diploid and are made when haploid gametes join in fertilization
B. diploid and are made when haploid gametophytes join in pollination
C. Haploid and are made when haploid spores undergo mitosis
D. haploid and are made when haploid ovules undergo meiosis.
I think it's B but I feel like I'm WAY off :(
No its not, the answer is C: Haploid, and are made when haploid spores undergo mitosis.
THE ANSWER IS a FOOLS
From what I could find when I looked it up I believe it's c
To determine the correct answer, let's break down the options, step by step:
A. Diploid and are made when haploid gametes join in fertilization.
B. Diploid and are made when haploid gametophytes join in pollination.
C. Haploid and are made when haploid spores undergo mitosis.
D. Haploid and are made when haploid ovules undergo meiosis.
First, let's understand the process of pollen grain formation in angiosperms. Pollen grains are the male gametophyte structures responsible for transferring male gametes (sperm cells) to the female reproductive organs (ovules) during pollination.
In angiosperms, the formation of pollen grains starts with the development of a diploid structure called microsporocyte, located within the anther of the flower. Through a process called meiosis, the microsporocyte undergoes two cell divisions, resulting in the production of four haploid microspores.
Therefore, options A and B, which suggest that pollen grains are diploid, are not correct.
Now let's consider options C and D:
C. Haploid and are made when haploid spores undergo mitosis.
D. Haploid and are made when haploid ovules undergo meiosis.
In angiosperms, the microspores produced by meiosis undergo mitosis to produce the pollen grains. This means that each microspore (haploid) divides mitotically to produce two separate cells that eventually develop into the pollen grain.
Therefore, option C, which suggests that pollen grains are made when haploid spores undergo mitosis, is the correct answer.
In conclusion, the correct answer is C. Haploid and are made when haploid spores undergo mitosis.