Solution:
Primitive animals are ones that have not changed dramatically over the millennia and remain very similar to their ancestors.
The first members of the human lineage lack many features that distinguish us from other primates. Although it has been a difficult quest, we are closer than ever to knowing the mother of us all. Until recently, the evolutionary events that surrounded the origin of the hominin lineage — which includes modern humans and our fossil relatives — were virtually unknown, and our phylogenetic relationship with living African apes was highly debated. Gorillas and chimpanzees were commonly regarded to be more closely related to each other due to their high degree of morphological and behavioral similarities, such as their shared mode of locomotion — knuckle-walking. But with the advent of molecular studies it has become clear that chimpanzees share a more recent common ancestor with humans, and are thus more closely related to us than they are to gorillas (e.g., Bailey 1993, Wildman et al. 2003). The similarities between the living African apes were thought to have been inherited from a common ancestor (=primitive features), implying that the earliest hominins and our last common ancestor shared with chimpanzees had features that were similar, morphologically and behaviorally, to the living African apes (Lovejoy 2009). With the discoveries of the earliest hominin species discussed below, it is now possible to critically examine these assumptions.
Answer: Wear eye protection, rubber gloves
Handle acid with care and follow CLEAPSS or SSERC guidelines on its use.
Answer:
Autograph would be classified as PRODUCERs
The cardiovascular condition with no overt symptoms and known as the "silent killer" is the hypertension.
Blood pressure is recorded in two numbers. The upper limit is the systolic pressure and the lower limit is diastolic pressure. Systolic pressure is the maximum pressure at which the heart pumps the blood to the different parts of the body and it is 120 mm/Hg. Diastolic pressure is the minimum pressure in the arteries during the relaxation of the heart and it is 80 mm/Hg. The normal blood pressure is given by 120/80 mmHg.
Hypertension, also known as the high blood pressure is a condition in which the blood pressure in the arteries is constantly high or elevated. Blood pressure with a value higher than 140/90 mm/Hg is considered to be hypertension. It is a silent killer because it normally does not exhibit any distinctive symptoms. The most common symptoms of hypertension are head ache, problems with vision, fatigue which are often ignored and remain untreated. This untreated, long-term hypertension is one of the important causes of cardiac diseases, renal failure, stroke and other fatal conditions.
Thus, no overt symptoms and the impact of hypertension associated with many life-threatening diseases makes it a "silent killer".
