Fig. 1.2 () The researchers put forward the following hypothesis:
If leaves of Posidona are partly covered by coralline algae, the growth of Posidona
is reduced.
Outline a laboratory-based experiment that the researchers could do to test their
hypothesis.
Your answer should include reference to the control of variables, and the collection
of quantitative results.

i thinking chemical change

the answer is: metamorphic rocks often show the presence of fossils, also a

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the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

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brain development. a child's brain undergoes an amazing period of development from birth to three—producing more than a million neural connections each second. the development of the brain is influenced by many factors, including a child's relationships, experiences and environment.

explanation: