Biology Unit 2 Essay
BIOLOGY UNIT 2 – STUDY GUIDE
CHAPTER 1: Environmental Factors and adaptions;
13.1
Note: Living organisms can survive, grow and reproduce only in surroundings that provide sufficient levels of nutrients, water, oxygen and carbon dioxide, and suitable living conditions such as light and temperature.
Tolerance range: the range of conditions – for example, temperature that an organism can survive in. Tolerance range also affects the distribution of an organism meaning where they live.
To live in a basic habitat an organism must have access to the basic requirements necessary for growth and reproduction. The environment supplies these requirements. The environment of organisms consists of both abiotic factors and biotic factors. …show more content…
It may affect the survival and reproduction of an organism.
Adaption: An adaption is an inherited characteristic that increases the likelihood to survive and reproduce of an individual organism.
Adapt: To change behaviour or functionally cope with changes in the external and internal environment. Such changes are short term and are not passed on to offspring.
Different organisms show characteristics functional, structural and behavioural adaptions that enable them to survive and reproduce in the face of changing conditions, internal and external.
Adaptions are the result of the evolutionary process of natural selection. * Acclimatising or adapt to: Some features of particular groups of organisms allow individuals to acclimatise to or adapt to changes in the internal and external environment.
13.2
Note: Living in water is a good place to live. Oxygen, carbon dioxide and nitrogen are dissolved from the atmosphere.
Abiotic Factors: * PH – The PH of water is a measure of its level of acidity or alkalinity. It is determined by the amount of dissolved carbon dioxide, which forms carbonic acid in water. Organisms tolerate a wide range of conditions, there for PH is not a very important factor but it can determine the existence of other …show more content…
There leaves are flat with increased surface area, with very little stomata. Gas exchange occurs between the water and the plant across the entire surface of the leaf. Water movement also occurs across the leaf surface.
Distribution of marine life on rocky shores: environmental factors and an organism’s tolerance range limit its distribution.
Example: rocky seashore –
Algae of the sub tidal zone: This zone is the least stressful zone, and it lies below the normal watermark. The most common algae in this zone are the large brown kelps, which are strongly attached to rocks and rocky formations. They have long fronds that float, whilst some have air filled bladders that help them float, and that are photosynthetic, and they form the canopy of a marine forest.
Organisms of the intertidal zone: Brown algae Hormosira banksia is the most common specie of the intertidal zone, more so in the lower part of the zone, towards the sea. It is protected from dry conditions at low tide by its sticky skin and water filled bladders.
Other algae such as barnacles are present in the intertidal zone, but they do not move as they attached to rocks. At low tide they close the hard valves of their shell, when the tide is higher they open and filter feed, exchanging plankton from the new supply of
CHAPTER 1: Environmental Factors and adaptions;
13.1
Note: Living organisms can survive, grow and reproduce only in surroundings that provide sufficient levels of nutrients, water, oxygen and carbon dioxide, and suitable living conditions such as light and temperature.
Tolerance range: the range of conditions – for example, temperature that an organism can survive in. Tolerance range also affects the distribution of an organism meaning where they live.
To live in a basic habitat an organism must have access to the basic requirements necessary for growth and reproduction. The environment supplies these requirements. The environment of organisms consists of both abiotic factors and biotic factors. …show more content…
It may affect the survival and reproduction of an organism.
Adaption: An adaption is an inherited characteristic that increases the likelihood to survive and reproduce of an individual organism.
Adapt: To change behaviour or functionally cope with changes in the external and internal environment. Such changes are short term and are not passed on to offspring.
Different organisms show characteristics functional, structural and behavioural adaptions that enable them to survive and reproduce in the face of changing conditions, internal and external.
Adaptions are the result of the evolutionary process of natural selection. * Acclimatising or adapt to: Some features of particular groups of organisms allow individuals to acclimatise to or adapt to changes in the internal and external environment.
13.2
Note: Living in water is a good place to live. Oxygen, carbon dioxide and nitrogen are dissolved from the atmosphere.
Abiotic Factors: * PH – The PH of water is a measure of its level of acidity or alkalinity. It is determined by the amount of dissolved carbon dioxide, which forms carbonic acid in water. Organisms tolerate a wide range of conditions, there for PH is not a very important factor but it can determine the existence of other …show more content…
There leaves are flat with increased surface area, with very little stomata. Gas exchange occurs between the water and the plant across the entire surface of the leaf. Water movement also occurs across the leaf surface.
Distribution of marine life on rocky shores: environmental factors and an organism’s tolerance range limit its distribution.
Example: rocky seashore –
Algae of the sub tidal zone: This zone is the least stressful zone, and it lies below the normal watermark. The most common algae in this zone are the large brown kelps, which are strongly attached to rocks and rocky formations. They have long fronds that float, whilst some have air filled bladders that help them float, and that are photosynthetic, and they form the canopy of a marine forest.
Organisms of the intertidal zone: Brown algae Hormosira banksia is the most common specie of the intertidal zone, more so in the lower part of the zone, towards the sea. It is protected from dry conditions at low tide by its sticky skin and water filled bladders.
Other algae such as barnacles are present in the intertidal zone, but they do not move as they attached to rocks. At low tide they close the hard valves of their shell, when the tide is higher they open and filter feed, exchanging plankton from the new supply of