Tropical Rain Forest

Biology 5th period by: Izabell Ventura


Warm and wet describes the tropical rain forest climate. The average annual temperature is above 20 degreesCelsius, there is never a frost. Rainfall varies widely from a low of About 250cm of rain per year to about 450cm/year. That means a range from about 8 to 14ft of rain per year.

Global Positioning

Some tropical rain forests are located in the Southeast Asia and the pacific islands (25% of the world's tropical rain forests) and west Africa (18%)

Examples of findings in my biome

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Adaptations of the tropical rainforest

Lianas are climbing woody vines that drape rainforest trees. They have adapted to life in the rainforest by having their roots in the ground and climbing high into the tree canopy to reach available sunlight. Many lianas start life in the rainforest canopy and send roots down to the ground.

The function of root hairs is to collect water and mineral nutrients present in the soil and take this solution up through the roots to the rest of the plant.

Stomata are the little pores on the outer layer of leaves that allow carbon dioxide, water vapor and oxygen in and out of the leaf.

Xylem is the name of a vascular tissue that is found in plants and is useful in conducting water and nutrients from the root, through the stem, to other parts of the plant.

Phloem tissue transports and distributes sucrose and nutrients produced by the plant during photosynthesis to the rest of the plant tissue.

A flower is the seed-bearing part of a plant, consisting of reproductive organs (stamens and carpels) that are typically surrounded by a brightly colored corolla (petals) and a green calyx (sepals).

A meristem is the tissue in most plants containing undifferentiated cells (meristematic cells), found in zones of the plant where growth can take place. Meristematic cells give rise to various organs of the plant and keep the plant growing.

Seed is a flowering plant's unit of reproduction, capable of developing into another such plant.

Cones make seeds as well as flowers.

Sepal each of the parts of the calyx of a flower, enclosing the petals and typically green and leaf like.

Petal each of the segments of the corolla of a flower, which are modified leaves and are typically colored.

Stamen the male fertilizing organ of a flower, typically consisting of a pollen-containing anther and a filament.

Anther the part of a stamen that contains the pollen.

Pistil the female organs of a flower, comprising the stigma, style, and ovary.

Ovary a female reproductive organ in which ova or eggs are produced, present in humans and other vertebrates as a pair.

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Flying squirrel and phalanger

Natural selection

15 bacteria, Animals and fungi in the tropical rainforest

Agrobacterium tumefaciens:

Common name- Agrobacterium tumefaciens.

Scientific name- Rhizobium radiobacter.

Adaptions- this bacteria has enabled to use a tool in plant breeding. Any desired genes, such as insecticidal toxin genes or herbicide resistance genes, can be engineered into the bacterial DNA and thereby inserted into the plant genome.

Reproduction- multiplication of itself.

Food- nutrients that leak from the roots of a plant.

They are prokaryotic.

There are millions of these bacteria on the earth.


Common name- beijerinckii

Scientific name- clostridium beijerinckii

Adaptions- classical stress inducers such as osmotic pressure, temperature, starvation.

Reproduction- multiplication of itself

Food- the nutrients from water.

They are prokaryotic.

There are millions of these bacteria on the earth.


Common name- klebsella

Scientific name- klebsella pneumoniae

Adaptions- allowing DSZ to metabolize SZ.

Rroduction- multiplication if itself

Food- nutrients from water

They are prokaryotic

There are millions of them on the earth.


Common name- Azotobacter

Scientific name- Azotobacter vinelandii




They are prokaryotic.

Millions of them are found in the world.

Questions over the tropical rainforest

How does population and density affect the tropical rainforest? Habitats supporting larger numbers of individuals can support more populations and more species than habitats supporting small numbers of individuals.