The answer is spicules. These
sharp-pointed structures are formed from calcium carbonate skeleton of
the organisms. They can also be formed from silica. They can be big (megascleres),
or microscopic (microscleres). Also dependent on the number of axis on the spicules, they are classified as monoaxon,
triaxon or polyaxon.
Green decade theory helps explain why coverage of ecology issues after the first earth day in 1970 sparked an increase in public concern about the environment.
The concept of green growth is concentrated to assume with economic growth and development can continue while combined with the negative impacts on the environment which include climate change are getting reduced while the natural environment continues to provide services concerned with ecosystem means to decouple.
The critical theory tradition contains the Green theory which makes sense that environmental issues arising out of questions about concerns among ourselves and others in the perspective of community and collective type of decision-making.
Green Growth results in the fostering of economic growth and development conditions while ensuring that the natural assets continue to provide the aspects of productive resources and environmental services where our well-being was settled up.
Learn to know more about the environmental advantages of building green on
brainly.com/question/27655493
#SPJ4
The reproductive system is different from other body systems in that the reproductive system functions in the survival of a species while all other body systems function to ensure the survival of the individual.
Answer:
a.Many mitochondrial genes resemble proteobacteria genes, while the genes in the chloroplast resemble genes found in some photosynthetic bacteria.
c.Mitochondria and chloroplasts both have their own circular DNA and 70S ribosomes that are similar to those found in bacteria.
d.Mitochondria and chloroplasts replicate by a process similar to mitosis.
Explanation:
Endosymbiotic theory states that mitochondria and chloroplast which are organelles of eukaryotic cells were once independently living micro-organisms but with due course of time eukaryotic cells engulfed them and they become an integral part of these eukaryotic cells.
The resemblance between mitochondrial genes with those of proteobacteria and chloroplast genes with photosynthetic bacteria strongly support endosymbiotic theory. Apart from this, the presence of their own DNA that too circular just like prokaryotic microbes and 70 S ribosomes also support this theory. Also just like prokaryotic cells, before cell division mitochondria and chloroplasts undergo replication by means of a process known as binary fission.
