When you look at a pine tree the plant you see is?
Pine trees are conifers (coniferous = cone bearing) and carry both male and female sporophylls on the same mature sporophyte. Therefore they are monoecious plants. Like all gymnosperms pines are heterosporous and generate two different types of spores (male microspores and female megaspores).
Are maple leaves diploid?
Maples generally are diploids with two copies of 13 base chromosomes (2n = 2x = 26).
What does the term gymnosperm mean and in what sense does it apply to pine trees?
What does the term gymnosperm mean, and in what sense does it apply to pine trees? Gymnosperm means "naked seed" seeds are produced out in the open on cone scales. Apart from size differences, how can you distinguish a cone scale of a pine seed cone from that of a pine pollen cone?
What is the conspicuous part of a fern plant?
leaf The most conspicuous part of the fern sporophyte is the leaf. The typical fern leaf, often termed a frond, is an elaborate structure composed of numerous leaflets.
Are pine cones gametophytes?
Cones form on a mature sporophyte plant. Inside male cones, male spores develop into male gametophytes. Each male gametophyte consists of several cells enclosed within a grain of pollen. Inside female cones, female spores develop into female gametophytes.
Are pine trees Sporophytes or gametophytes?
Pine tree is a gymnosperm. Sporophyte is the dominant phase in the life cycle of gymnosperms.
How many chromosomes do maple trees have?
maples have 26 chromosomes and the hy- brids produce apparently normal viable seeds.
Are pollen grains haploid or diploid?
haploid Pollens are haploid as a result of meiosis. Pollen grain are male gametes in plants. And gametes are haploid in order to restore the correct number of chromosomes in the zygote after fusion . For that the mother cell undergo meiosis to produce four haploid cells.
Why is a pine tree called a sporophyte?
Pine trees are conifers (coniferous = cone bearing) and carry both male and female sporophylls on the same mature sporophyte. Therefore, they are monoecious plants. Like all gymnosperms, pines are heterosporous and generate two different types of spores (male microspores and female megaspores).
Are pine trees gymnosperms?
Conifers like the spruce, cedar and pine tree are gymnosperms and have seeds on cones.
What is a fern plant?
Ferns are plants that do not have flowers. Ferns generally reproduce by producing spores. Similar to flowering plants, ferns have roots, stems and leaves.
Where is the frond on a fern?
The leaves of ferns are often called fronds. Fronds are usually composed of a leafy blade and petiole (leaf stalk). Leaf shape, size, texture and degree of complexity vary considerably from species to species. A fern leaf or frond.
Is a pine tree a sporophyte or gametophyte?
Pine tree is a gymnosperm. Sporophyte is the dominant phase in the life cycle of gymnosperms.
Are pine cones gametophytes or sporophytes?
Cones form on a mature sporophyte plant. Inside male cones, male spores develop into male gametophytes. Each male gametophyte consists of several cells enclosed within a grain of pollen. Inside female cones, female spores develop into female gametophytes.
Are pine trees gametophytes?
The gametophytes of conifers, like those of other seed plants, live out their brief, nonphotosynthetic lives almost entirely within the spore wall. All of their nutrition is derived from the parent sporophyte. The female gametophyte is never released from the tree until the seed matures.
Are pines gymnosperms?
Conifers. Conifers like the spruce, cedar and pine tree are gymnosperms and have seeds on cones. Most coniferous trees are evergreen and are specially adapted to survive in areas with lots of snow.
How many chromosomes are in a pine tree?
12 chromosomes Like all other species of Pinus, the haploid genome of Pinus strobus consists of 12 chromosomes and its diploid genome has 24 chromosomes.
Do trees have chromosomes?
Trees can have many more or fewer chromosomes in their cells. Three genetically simple trees are the redbud, red alder and river birch. They have 12, 14 and 14 chromosomes, respectively. If chromosome number is a gauge of complexity, these trees are much less complex than people.
Which of the following is a triploid tissue mesophyll cells endosperm of wheat Nucellus pollen grain?
Thus, the correct answer is 'Maize endosperm.
What will be the chromosome number of mesophyll tissue cells and male gametes in a flowering plant where 2n 18?
So, correct answer is '12'.
Are Maples gymnosperms?
Broadleaf species such as oak, hickory, ash, maple, walnut, etc. are angiosperms. Needle-leaf species such as pine, spruce, fir, hemlock, baldcypress, larch, etc. are gymnosperms.
Are Maples angiosperms?
Angiosperms are trees have broad leaves that usually change color and die every autumn. Oaks, maples and dogwoods are examples of deciduous trees. Some angiosperms that hold their leaves include rhododendron, live oak, and sweetbay magnolia.
Is a fern a leaf?
The leaves of ferns are often called fronds. Fronds are usually composed of a leafy blade and petiole (leaf stalk). Leaf shape, size, texture and degree of complexity vary considerably from species to species. A fern leaf or frond.
Do ferns flower?
Ferns are plants that do not have flowers. Ferns generally reproduce by producing spores. Similar to flowering plants, ferns have roots, stems and leaves.
What is a tree frond?
A frond is a large, divided leaf. In both common usage and botanical nomenclature, the leaves of ferns are referred to as fronds and some botanists restrict the term to this group.
What are fronds?
Definition of frond 1 : a large leaf (especially of a palm or fern) usually with many divisions.
Are maple trees gymnosperms?
Broadleaf species such as oak, hickory, ash, maple, walnut, etc. are angiosperms. Needle-leaf species such as pine, spruce, fir, hemlock, baldcypress, larch, etc. are gymnosperms.
Is maple a gymnosperm?
Broadleaf species such as oak, hickory, ash, maple, walnut, etc. are angiosperms. Needle-leaf species such as pine, spruce, fir, hemlock, baldcypress, larch, etc. are gymnosperms.
What is a pine leaf?
The needles, which are the best-known method of identifying pine trees, are the adult leaves which are know to last for up to 40 years on the tree, dependent on the pine species. These grow in clusters from a dwarf shoot which protrudes from the scale leaf, and are often arranged in 2-5 needles.
How many genes does a pine tree have?
Longleaf pine trees have somewhere around 50,000 genes. The full genome has not been sequenced – it would take years of research to do so. But scientists know that within that immense genome, not all of the genes are active at all times.