Missense substitution (i think)
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Answer:
A tissue
Explanation:
Cells are grouped together to carry out specific functions. A group of cells that work together form a tissue.
I hope this helps :")
Answer:
The stars which lie along this nearly straight diagonal line are known as main sequence stars.
Explanation:
Answer:
D. Keystone
Explanation:
Think of it from a bridge building perspective the keystone in an arc bridge was the tip or the highest point if that stone was pulled out all of the other stones would fall out with it, same goes for ecosystems if that one species declines dramatically or goes extinct then the rest of the population will proceed to do so as well
Many rickettsia are PATHOGENS.
Pathogens are micro organism that cause diseases and rickettsia are majorly disease causing organisms. They are rod shaped bacteria and most species are gram negative. They are natural parasite of some arthropods and they cause diseases in both humans and animals.
