It considered that all terrestrial plant species that exist today have evolved from Rhyniophyta (a type of spore plants, compiled by the most primitive forms of vascular). Now terrestrial plants presents by the Moss family, psilotaceae, lycopsids, class of the Horsetail, fern, gymnosperms and flowering plants. Based on the cladogram, It assumed that the ancestors of all existing plants are algae, particularly green.
B. extraneous variable
C. control group
D. dependent variable
E. independent variable
4) A variable that is purposefully changed in an experiment is a(n) __________.
A. control group
B. independent variable
C. control variable
D. extraneous variable
E. dependent variable
5) A variable that is changed, depending on the change in the independent variable is a(n) __________.
A. dependent variable
B .control variable
C. control group
D. extraneous variable
E. independent variable
A variable that is kept the same during an experiment is a controlled variable. Thus, the correct option for this question is A.
A variable that is purposefully changed in an experiment is an independent variable. Thus, the correct option for this question is B.
A variable that is changed, depending on the change in the independent variable is a dependent variable. Thus, the correct option for this question is A.
In experimental science, variables may be defined as a type of factor or information that can be changed during the course of an experiment. It is a type of factor that can be manipulated, controlled for, or measured in an experiment.
In experimental science, there are three types of variables are used. They are as follows:
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Answer:
Secondary succession generally occurs at the places where there was a previously established ecosystem.
The ecosystem that is destroyed due to some human activities or some natural disasters such as forest fire, flood et cetera.
This leads to the secondary succession where there was pressence of an ecosystem sometime before.
2. an early stage in the development of an animal or plant
(hydroskeleton)
3. the period of time offspring is carried in the womb before birth
(chitin)
4. gamete-producing organ in animals
(gonad)
5. support and movement structure of animals that is maintained by water or body fluid (gestation period)
6. an early growth stage or phase of life of an organism that undergoes metamorphosis
(embryo)
Answer:
a polysaccharide-based substance that forms the exoskeleton of arthropods
(chitin)
an early stage in the development of an animal or plant
(embryo)
the period of time offspring is carried in the womb before birth
(gestation period)
gamete-producing organ in animals
(gonad)
support and movement structure of animals that is maintained by water or body fluid
(hydroskeleton)
an early growth stage or phase of life of an organism that undergoes metamorphosis
(larva)