Get premium membership and access questions with answers, video lessons as well as revision papers.
- Nested Style: In a nested display of a dichotomous key, the next question in a series appears “nested” under the answer leading to that question.This is often achieved by using indentations, with each question following the first one being further indented to distinguish it from the rest.
- Linked Style:In a linked style of dichotomous key, questions are laid-out in list form.Each answer directs the user which question to ask next, and the user must find the correct question in order to properly identify the organism.
- Branching Tree: In a “branching” or “tree” layout of a dichotomous key, each of an organism’s characteristics is laid out in a style similar to a flow chart or tree of life.Each question or characteristic begins a new “branch” of the tree, with each subsequent question being a sub-branch.Identification is reached at the end of the tree’s “branches.”
- Computer Program: With handheld computers becoming more common, identification keys are increasingly being converted into computer program form.This method allows the user to answer questions one at a time, and have the correct follow-up question automatically presented.Much like popular online quizzes, in this way the user can reach the correct species identification after answering a series of either-or questions.
franco crick answered the question on January 31, 2018 at 14:58
- Define dichotomous key and give three functions performed by it.(Solved)
Define dichotomous key and give three functions performed by it.
Date posted: January 31, 2018. Answers (1)
- How do bacteria reproduce?
A. Sexual reproduction
B. Horizontal gene transfer
C. Binary fission
D. Mitosis(Solved)
How do bacteria reproduce?
A. Sexual reproduction
B. Horizontal gene transfer
C. Binary fission
D. Mitosis
Date posted: January 31, 2018. Answers (1)
- Which is not one of the three main shapes of bacteria?
A. Coccus
B. Bacillus
C. Spiral
D. Star(Solved)
Which is not one of the three main shapes of bacteria?
A. Coccus
B. Bacillus
C. Spiral
D. Star
Date posted: January 31, 2018. Answers (1)
- Define the following: (a) Prokaryote. (b)Binary fission. (c)Probiotic. (d)Horizontal gene transfer.(e) Eukaryotes.(Solved)
Define the following: (a) Prokaryote. (b)Binary fission. (c)Probiotic. (d)Horizontal gene transfer.(e) Eukaryotes.
Date posted: January 31, 2018. Answers (1)
- Outline the characteristics of insect-pollinated flowers.(Solved)
Outline the characteristics of insect-pollinated flowers.
Date posted: January 31, 2018. Answers (1)
- Describe in details the eleven organ systems found in a human body.(Solved)
Describe in details the eleven organ systems found in a human body
Date posted: January 31, 2018. Answers (1)
- Discuss the below cells under the following subheadings: (a)cell adaptations. (b)cell functions. (i)Skin cell (ii)Nerve cell (iii)Muscle cell (iv)Red blood cell (v)Root hair cell (vi)Sperm cell(Solved)
Discuss the below cells under the following subheadings: (a)cell adaptations. (b)cell functions.
i)Skin cell
ii)Nerve cell
iii)Muscle cell
iv)Red blood cell
v)Root hair cell
vi)Sperm cell
Date posted: January 29, 2018. Answers (1)
- Describe the adaptations of a mammalian ear to its functions.(Solved)
Describe the adaptations of a mammalian ear to its functions.
Date posted: January 29, 2018. Answers (1)
- Describe the adaptations of a mammalian eye to its functions.(Solved)
Describe the adaptations of a mammalian eye to its functions.
Date posted: January 29, 2018. Answers (1)
- What chemical compound is found in cassava 'root' present at the center making it unrawful.(Solved)
What chemical compound is found in cassava 'root' present at the center making it unrawful.
Date posted: January 29, 2018. Answers (1)
- State the post fertilization changes that occur in a vertebrate ovum (Solved)
State the post fertilization changes that occur in a vertebrate ovum
Date posted: January 26, 2018. Answers (1)
- Describe how a mammalian heart is structurally adapted to its
function(Solved)
Describe how a mammalian heart is structurally adapted to its
function
Date posted: January 26, 2018. Answers (1)
- Using a relevant example in each case, describe simple and
conditional reflex actions.(Solved)
Using a relevant example in each case, describe simple and
conditional reflex actions.
Date posted: January 26, 2018. Answers (1)
- State two factors which increase the rate of mutation(Solved)
State two factors which increase the rate of mutation.
Date posted: January 25, 2018. Answers (1)
- Name five methods of excretion in plants.(Solved)
Excretion in plants.
Date posted: January 25, 2018. Answers (1)
- State the reason for the decrease of biomass in the successive trophic levels?(Solved)
State the reason for the decrease of biomass in the successive trophic levels?
Date posted: January 25, 2018. Answers (1)
- Name the common heart diseases in humans(Solved)
Name the common heart diseases in humans
Date posted: January 24, 2018. Answers (1)
- State the characteristics of mutations?(Solved)
State the characteristics of mutations?
Date posted: January 24, 2018. Answers (1)
- State the differences between somatic and autonomic systems of peripheral nervous system?(Solved)
State the differences between somatic and autonomic systems of peripheral nervous system?
Date posted: January 24, 2018. Answers (1)
- forWhat are the functions of a synapse?(Solved)
What are the functions of a synapse?
Date posted: January 24, 2018. Answers (1)