Both plant and animal circulatory systems transport nutrients to cells to keep them alive. In animals, the heart pumps blood through vessels to deliver sugars. In plants, xylem draws water and minerals up from the roots and phloem transports sugars made in the leaves throughout the plant. While both systems supply cells, plants have a two-way vascular system and produce their own food, whereas animals rely on consuming food for nutrients and have a one-way circulatory system.
This document introduces the two types of plant reproduction: sexual and asexual. Sexual reproduction requires fertilization by combining egg and sperm cells through meiosis to produce haploid gametes. The male and female reproductive organs can be on the same or separate plants. Asexual reproduction allows some plants like seedless fruits to reproduce by growing a new genetically identical plant from part of the original plant, making clones without fertilization.
Sexual and asexual reproduction biota ed_pascualOmar Jacalne
Sexual reproduction involves two parents combining genetic material, resulting in offspring that are a combination of both parents. Asexual reproduction involves a single parent where offspring are identical copies with exact genetic makeup as the parent. Both reproduction methods are described in the document, including the processes of fertilization, embryogenesis, and plant reproduction through seeds or vegetative structures for sexual, and budding, fragmentation for asexual.
This document provides an overview of various topics related to nutrition in animals and plants, including:
1) It describes different types of digestive, respiratory, circulatory, and excretory systems in animals.
2) It explains processes like digestion, respiration, blood circulation, and excretion that are involved in nutrition.
3) It discusses plant nutrition topics such as absorption, transport of nutrients, gas exchange, photosynthesis, metabolism, and excretion in plants.
Vegeative propagation and sexual repro. in flowersSAloni Mehta
Vegetative propagation is a form of asexual reproduction where the offspring is genetically identical to the parent plant. It can occur naturally through structural modifications like buds detaching from the parent, or artificially through methods like grafting, layering, and micropropagation. Fertilization is a double process where one sperm fuses with the egg to form the embryo while the other fuses with polar nuclei to form endosperm. Pollination involves the transfer of pollen, which can be wind or animal mediated, leading to fertilization and seed production.
The document summarizes sexual and asexual reproduction in plants. Sexual reproduction involves flowers producing male pollen and female eggs that are fertilized, forming seeds containing embryo plants. Asexual reproduction uses vegetative propagation methods like runners, cuttings, grafting, bulbs/tubers, and spores to create new plants without fertilization. The document also describes perfect and imperfect flowers and different pollination mechanisms like self-pollination, wind pollination, and insect pollination.
Male and female gametes from plants unite during sexual reproduction to form a zygote, which develops into a new plant body. Sexually reproduced offspring have two parents and thus exhibit more variation than asexually reproduced offspring that have a single parent. Pollination involves the transfer of pollen grains containing male gametes from the anther to the stigma. It can occur through biotic vectors like insects or abiotically via wind or water. Self-pollination involves pollen transfer within a flower or between flowers on the same plant, while cross-pollination transfers pollen between plants. Asexual reproduction requires only one parent and can occur via vegetative propagation using plant structures like stems, leaves, and roots
46. SemeSeme
Reproduktivni organ biljke; razvija se iz
semenog zametka nakon oplođenja
U njemu se nalazi klica i rezervne materije
(šećeri, ulja, proteini)
Semena se razlikuju po građi, rasporedu
hranljivih materija, klijanju