PLANT AND ANIMALS Flashcards
Group of organs that have a specific functions that work together to perform 1 or more actions
Organ system
Cells form ___ when they work together
tissue
_____ form tissue when they work together
cells
Cell theory:
all living things are made up of cells, cells are the basic unit of life, and cells are the smallest units of organism.
____ forms organs when they work together
Tissue
form systems when they work together
organs
forms organisms (living organisms) when they work together
systems
2 major forms of reproduction
sexual and asexual
The process of creating a new individual uses two parent organisms.
sexual rep
Each parent contributes a gamete a sex cell that has half of the normal DNA of a regular body cell.
sexual reproduction
In males, the gametes are _____, and females, the gametes are _______
sperm and egg
requires two parents
sexual reproduction
When these two gametes combine during fertilization, the result is a zygote, which then develops into an embryo.
sexual reproduction
Requires only one parent.
Asexual
A small growth (bud) forms on the parent’s body. The bud grows until it becomes an independent organism, then it detaches and starts living on its own. This is seen in yeast, hydra (a small aquatic animal), and some corals.
Budding
4 major types of asexual reproduction
Binary, budding, fragmentation, parthenogenesis
An organism breaks into pieces, and each piece regrows into a complete organism. Some organisms do this naturally, while others reproduce this way when injured. This method is found in starfish, flatworms, and some algae.
Fragmentation
a single-celled organism splits into two identical organisms by copying its DNA and dividing. These are commonly found in bacteria, amoebas, and some algae.
Binary fission
In this rare type of asexual reproduction, a female can produce offspring without mating. The offspring are usually clones of the mother or may have slight genetic differences. Found in bees, ants, some lizards, and even sharks.
Parthenogenesis
Some organisms produce tiny reproductive cells called spores that can survive in harsh conditions. When conditions are right, these spores develop into new organisms.
This is commonly seen in fungi (like mushrooms), mold, and some bacteria.
Spore formation
Some plants don’t need seeds to reproduce! They grow new plants from their roots, stems, or leaves This method ensures fast reproduction and is commonly used in agriculture. Examples include potatoes, strawberries, onions, and grasses.
Vegetative propagation
Produce their foods thru photosynthesis
autotrophs
primary producers of earths ecosystem
plant organ system
2 organ systems of vascular plants
shoot and root system