Answer:
Autotrophs
Explanation:
Some rare autotrophs produce food through a process called chemosynthesis, rather than through photosynthesis. Autotrophs that perform chemosynthesis do not use energy from the sun to produce food. Instead, they make food using energy from chemical reactions, often combining hydrogen sulfide or methane with oxygen.
Answer:
If we're talking about human organism then
It is multicelular.
It has a backbone.
It contains cells without nuclei.
Explanation:
human as almost all animals in the world is multicellular meaning they have more than one cell (some bacterias has only one)
backbone or "vertebra" is the is the bone of our back who supports us making us stand up.
Yes our cells contain nuclei
, The nucleus contains nucleoplasm, a component where it is immersed in genetic material and as structures that are important for the performance of its functions
And finally our body don't have radial symmetry, radial symmetry is when you can "cut" the image in more than one piece keeping the symmetry in every side, some animals with radial symmetry are the starfish and the jellyfish.
Answer:
years
Explanation:
Given-
Half life of 
C 
years
As we know -
Where
Mass of radioactive carbon after a time period "t"
initial mass of radioactive carbon
radioactive decay constant
time
First we will find the value of "k"
On solving, we get -
Now, when mass of 14C becomes 
% of the plant material on earth today, then its age would be
years
There are generally three kinds of mutation.
1. Substitution
2. Deletion
3. Insertion
A substitution is change one nucleotide for another
A deletion is removing a nucleotide
An addition Is inserting a nucleotide
Red blood cell (or erythrocyte): carries oxygen, bound to hemoglobin, to deliver to the tissues. This is an anucleate cell type.
Platelet (or thrombocyte): important in the process of blood clotting. Generated from the megakaryocyte.
Neutrophil: short-lived, phagocytic cell that is quick to respond to pathogen infection. Most abundant of the leukocytes.
Lymphocyte: used in the immune response, as either B- or T-cells.
Monocyte: wandering blood cell. Largest of the leukocytes.
Eosinophil: phagocytic cell that engulfs antibody-covered pathogens; an acidic granulocyte with bi-lobed nucleus.
Basophil: releases histamine and heparin. Least abundant leukocyte.
