<span>Answer:The blood-brain
barrier (BHE)
BHE is a barrier that's highly permeability selective and protects
the central nervous system from potential dangers like viruses, bacteria and parasytes that may be circulating int he blood. <span>It is composed of endothelial cells, astrocytes, pericytes.</span></span>
"Time is the independent variable, and the number of birds is the dependent variable" is the one among the following choices given in the question that states the independent and dependent variables in Sam’s investigation correctly. The correct option among all the options that are given in the question is the second option.
1)magnification goes by 10x (read 10 times), 100x,1000x and some goes 10,000x
2)Always focus first using lowest power possible first, switch to medium power (100x) after it's focused on low power(10x), on 100x, use the small knob to focus it more. DO NOT touch the bigger nob when in medium or high power. Switch to high power (100x) when it is focused on medium power, again focus again using the small knob on high power.
3) So it doesn't gather dust and fog up the lense? that one should be self explanatory
Answer:
No, the lack of short-tailed animals in the sample does not suggest that the population is out of Hardy-Weinberg equilibrium in this forest. It probably means that individuals with short tails were not included in the sample by chance, as their expected frequency in the population is considerably low.
Explanation:
You will find the correct and complete explanation in the attached file due to technical problems
Answer: “The adrenal gland secreted epinephrine, increasing blood pressure, which increased the heart rate and breathing.”
<span>Epinephrine is m<span>ore commonly known as adrenaline. It is a hormone secreted by the adrenal glands that are released into the bloodstreams during strong emotions of fear or anger. It caused an increase in heart rate and heavy breathing for James.</span></span>
