When atoms complete their outer electron shell by sharing electrons, they form?
Answer:
Which of the following mechanisms is used by gram-negative bacteria to cross the blood-brain barrier? D) Inducing TNF
Explanation:
The blood brain barrier is a barrier formed by brain microvascular endothelial cells, astrocytes and pericytes. Pathogens can cross this barrier by using different mechanisms. The Tumor Necrosis Factor (TNF) is the way gram-negative bacteria cross this mentioned blood-brain barrier.
im not even sure tbh these are really hard im so sorry
Bipedalism is the characteristic that hominins have and sets them apart from other primates. Bipedalism refers to locomoting. It is walking primarily upright on two feet, movement on two feet.
Walking upright distinguishes humans from other primates. Walking<span>, </span>running<span>, or </span>hopping are types of bipedal movement.
