In plants, there's a little break between meiosis and the production of sperm and eggs
. During that break, a separate little haploid plant grows. Gametophytes produce gametes by mitosis. In animals, meiosis produces sperm and egg, but in plants, meiosis occurs to produce the gametophyte.
What type of life cycle do plants have?
All plants have a life cycle with
alternation of generations
. Plants alternate between diploid sporophyte and haploid gametophyte generations, and between sexual reproduction with gametes and asexual reproduction with spores.
Does meiosis occur in plants?
In plants,
meiosis is initiated in sporogenous cells that are differentiated in ovules and anthers
(Bhatt et al., 2001). In each ovule, only a single megaspore mother cell (MMC) surrounded by the somatic nucellar cells is differentiated and then undergoes meiosis (Figure 1).
Does mitosis work in plants?
All eukaryotic organisms—including aquatic plants and algae—grow through the process of mitosis
. Mitosis is a process where one cell divides into two cells (Fig. 2.46).
Do plants have sperm?
Development of sperm and egg cells in plants
Within the flower, sperm cells are produced by pollen at the tips of stamens
, while egg cells develop in ovules, tiny structures embedded in the ovary at the base of the pistil.
Do plants go through cellular respiration?
Plants have mitochondria and can perform cellular respiration
. When would plants need to release energy by cellular respiration? Plants would release energy through cellular respiration in times when sunlight is not present.
Where does mitosis occur in a plant?
Answer and Explanation: Mitosis in plants happens
in the meristems of the plant that are located at the tip of the stems and roots
. These two areas are responsible to produce all the cells the plants needs to grow.
How does meiosis occur in flowering plants?
In flowering plants, meiosis occurs
in megaspore mother cells (megasporocytes) within the ovules of ovaries, and in microspore mother cells (microsporocytes) within the anthers of stamens
.
How are meiosis and gametogenesis linked in plants?
How are meiosis and gametogenesis linked in plants?
Meiosis produces haploid gametes directly
. Meiosis produces haploid gametes that are then modified by the sporophyte to produce functional gametes. Meiosis produces a haploid cell that divides by mitosis to form a gametophyte, which then produces gametes by mitosis.
Do all plants have a life cycle?
All plants have a life cycle
and this cycle is very important to agriculture. Because a major source of our food is from plants, we can classify them by their life cycle. Crops can be sorted into annuals, biennials and perennials.
Are spores produced by mitosis or meiosis?
In plants, spores are usually haploid and unicellular and are
produced by meiosis
in the sporangium of a diploid sporophyte. Under favourable conditions the spore can develop into a new organism using mitotic division, producing a multicellular gametophyte, which eventually goes on to produce gametes.
Do all plants have the same life cycle?
Flowering plants all go through the same stages of a life cycle
, but the length of time they take varies a lot between species. Some plants go though their complete cycle in a few weeks – others take many years. Annuals are plants that grow from a seed, then flower and make new seeds, then die, all in less than a year.
How plants are growing?
In plants, the cells are like millions and millions of tiny compartments stuck together, like Legos.
When plants have the right balance of water, air, sunlight and nutrients, their cells grow and divide, and the whole plant gets bigger and bigger
. And that's how plants grow.
How do plant cells affect the growth of the plants?
They grow through a combination of cell growth and cell division (mitosis). The key to plant growth is meristem, a type of plant tissue consisting of undifferentiated cells that can continue to divide and differentiate.
Meristem allows plant stems and roots to grow longer (primary growth) and wider (secondary growth)
.
How does mitosis differ between plants and animals?
The main difference between animal mitosis and plant mitosis is that
the mitotic spindle in animal mitosis is formed with the help of two centrioles whereas mitotic spindle in plant mitosis is formed without any centrioles
. Mitosis is followed by cytokinesis.
Do trees have sexes?
In trees,
sex exists beyond the binary of female and male
. Some, such as cedar, mulberry, and ash trees, are dioecious, meaning each plant is distinctly female or male. Others, such as oak, pine, and fig trees are monoecious, meaning they have male and female flowers on the same plant.
Do plants have gender?
Although
most plants have flowers with both male and female sex organs
, there are several thousands of plant species where male or female flowers form on different individuals. Surprisingly, the presence of well-established sex chromosomes in these dioecious plants is rare.
Do plants feel pain?
Given that plants do not have pain receptors, nerves, or a brain,
they do not feel pain
as we members of the animal kingdom understand it. Uprooting a carrot or trimming a hedge is not a form of botanical torture, and you can bite into that apple without worry.
How do plants go through photosynthesis?
During photosynthesis,
plants take in carbon dioxide (CO
2
) and water (H
2
O) from the air and soil
. Within the plant cell, the water is oxidized, meaning it loses electrons, while the carbon dioxide is reduced, meaning it gains electrons. This transforms the water into oxygen and the carbon dioxide into glucose.
Do plants do cellular respiration and photosynthesis?
Plants carry out both photosynthesis and cellular respiration
. They make their own food, and then break down those glucose molecules later, generating ATP to power their cellular processes.
Does photosynthesis only occur in plants?
Photosynthesis is seen in plants, algae and some microbes. So,
plants are not the only ones carrying out photosynthesis
. The basic requirement of photosynthesis is sunlight, water, carbon dioxide and the chlorophyll contained in chloroplasts. Plants fulfil all these requirements, hence photosynthesis is seen in plants.
Where does mitosis not occur in plants?
1 Answer. In plants, mitosis only occurs in the
meristematic tissue
.
Why does mitosis occur in the root tip of plants?
The tissue region at the root needs to have very active dividing cells, especially at the very root tip, as
to enable the root to grow in length
. Therefore, various stages of mitosis can be observed at this region.
Where does mitosis occur in plants and mammals?
In animals mitosis occurs in somatic cells and meiosis in germ cells during gamete formation,
in plants mitosis occurs in all except those which produce spores by meiosis
.
Where does meiosis occur in most plants?
Meiosis, a specialized cell division to produce haploid cells, marks the transition from a sporophytic to a gametophytic generation in the life cycle of plants. In angiosperms, meiosis takes place in
sporogenous cells that develop de novo from somatic cells in anthers or ovules
.
Where does meiosis occur in higher plants?
The site of meiosis in higher plants is
the spore mother cell
. In land plants and some algae, there is an alternation of generations such that meiosis in the diploid sporophyte generation produces haploid spores.
