WorksheetsUnit 2. The Byosphere (I). Pages 28-31
Total questions: 25
Worksheet time: 25mins
Factors that make life on Earth possible:
(a)
Non-living things are made of:
Organic matter
Inorganic matter
inorganic leftovers
Organic leftovers
The elements that form part of the living things are called:
(a)
What bioelements are the most abundant?
Carbon, hydrogen, oxygen and carbon dioxide
Oxygen, carbon, nitrogen and sulfur
Nitrogen, carbon dioxide, oxygen and Lithium
Oxygen, nitrogen, hydrogen and carbon
Biomolecules may be:
(a)
Life processes that are common to all living things on Earth:
(a)
There are two types of nutrition:
(a)
They are stored and function as an energy reserve. They also contribute to cell structure.
Lipids
Carbohydrates
Nucleic acids
Proteins
They are needed for growth and to maintain and repair the body cells, tissues and organs.
Lipids
Carbohydrates
Proteins
Nucleic acids
Heterotrophs that can obtain nutrients from dead organic matter:
(a)
It enables living things to obtain energy (through the brekdown or descomposition of substances) to stay alive:
Respiration
Excretion
Transfusions
Nutrition
Process through which living things remove waste materials:
(a)
Changes in temperature and humidity are examples of changes in the environment. An example of a change in a living thing is hunger.These are called:
Stimuli
Responses
Answers
Tumili
Animals have sense organs to receive____________and sense organs to respond to them. Some organs are __________ which bring about the response.
(a)
The coordination between stimuly and response is controlled by:
(a)
Chemical substances that act as messengers between cells:
The postman
Oxygen
Hormones
Nucleic acids
It is the creation of new individuals with similar traits to their parents:
(a)
It happens when a single living thing reproduces itself
(a)
Species in which the male reproductive organs and the female reproductive organs are found in separate organisms.
Dioecious
Monoecious
Hermaphroditic
Binary fission
Reproduction that requires two individuals of different sexes.
(a)
Lots of microorganisms reproduce ASEXUALLY by
BInary fusion
Gametes
BInary fission
MInary fission
Species that have both male and female reproductive organs together are called:
(a)
Two individuals of different sexes who have sexual reproduction produce specialised cells known as:
Gametes
Pseudopods
Ribosomes
Cytoplasm
Species that have male and female reproductive organs, but they are not located together.
(a)
Autotrophic organisms transform inorganic substances into organic matter. This requires energy which is acquired through light. This process is called:
Photography
Philosynthesis
Photosynthesis
Photosynthia
