Give the correct biological only the term next to the question number.
1.2.1
The concentration of sense organs at the anterior end of an animal
leading to the formation of a head.
12.2 Blood filled cavity found in Arthropoda.
1.2.3 An animal phylum that lacks true tissues and organs.
1.2.4 The germ layer that gives rise to muscles and other internal organs,
other than the gut.
1.2.5 Animals that are attached to a substrate.
1.2.6 A rod-like structure in Chordata usually replaced with a vertebral
column.
12.7 Body cavity filled with fluid and lined with mesoderm.
1.2.8 An organism in which the body wall is made up of two layers of cells.
12.9 Organisms that use stinging cells and tentacles to catch their prey.
-2.10 Arrangement of the body such that cutting through the centre of the
structure in any direction produces two identical halves.​

european union policies. the eu's long-term objective is to achieve levels of air quality that do not result in unacceptable impacts on, and risks to, human health and the environment. eu policies aim to reduce exposure to air pollution by reducing emissions and setting limits and target values for air quality.

the main environmental problems in western europe were: energy production/acid rain, nuclear power/waste, air pollution/climate, heavy metals, pesticides, water pollution, solid waste, and unforeseen accidents. many environmental problems are common to most european countries.

the father in the first generation probably had the recessive colorblind trait in his x chromosome. if he and his wife both had the colorblind trait, even if she had 1 recessive and 1 dominant, then that trait would be passed on to their kids.

(since you didn't attach the family tree this is just an assumption)

a time line cause it goes from 685 to 978

it cools slower in the earth meaning the crystals have more time to form than lava on the surface