| Coordination and Control | continuity of life | Inheritance | Biotechnology | Relationship of Organisms |
|---|---|---|---|---|
|
This part of the neuron receives impulses from other neurons or receptors.
What is the dendrite?
|
Gametes are produced by this type of cell division, which halves the chromosome number.
What is meiosis?
|
A gene
A section of DNA that controls a characteristic is known as ....
|
The modification of an organism’s genetic material by artificial means.
What is genetic engineering?
|
The study of interactions between organisms and their environment.
Define ecology?
|
|
Specific receptors
A hormone circulates in the blood but affects only target cells. Why?
|
This pattern of inheritance occurs when both alleles in a heterozygote contribute to the phenotype.
What is codominance?
|
Codominance.
In blood groups, AB is an example of which type of inheritance?
|
Vector
what is a molecule used to transfer foreign genes into a cell known as?
|
The feeding level of an organism in a food chain.
What is a trophic level?
|
|
This type of tropism is observed when roots grow downward in response to gravity.
What is positive gravitropism (geotropism)?
|
genetic mutation
A mutation in a gamete can lead to a heritable change called .....
|
Breeding of two identical homozygous individuals.
What does pure‑breeding mean?
|
They reproduce rapidly and are easy to manipulate.
State one advantage of using microorganisms in biotechnology.
|
Prey populations may increase, disrupting the ecosystem balance.
Explain the effect of removing a predator from an ecosystem.
|
|
Reflex arcs that involve interneurons between sensory and motor neurons are classified as this.
What is a polysynaptic reflex?
|
Ensures reproduction when pollinators are absent.
Why do some plants produce seeds through self-pollination
|
Mutation, meiosis, random mating, random fertilisation.
State at least two sources of genetic variation.
|
Yeast converts sugars into alcohol and carbon dioxide under anaerobic conditions.
Explain how fermentation is used to produce alcohol.
|
Changes in one species affect others, balancing populations.
Explain how interdependence maintains ecosystem stability.
|
|
Negativefeedback
The mechanism by which blood glucose returns to normal after a rise without external control.
|
Dominant shows in heterozygotes; recessive is masked
Explain the difference between dominant and recessive alleles.
|
Because there is an abnormal number of chromosomes.
Why is Down’s syndrome classified as a chromosome mutation?
|
Gene therapy can be used to replace faulty genes causing genetic diseases.
Describe one way biotechnology is used to treat genetic disorders.
|
Energy is lost as heat at each trophic level.
Explain why energy decreases along a food chain.
|
Support Us on Ko-fi