The answer is C. Fast moving water, due to steep slopes in
the mountain form V-shaped valley because
the erosive power of the water is
projected vertically more than horizontally. This is the vice versa in plains
where the water moves at slower speeds. The horizontal
erosion power is dominant over vertical erosion
hence the banks of the river are eroded more than the bed in the plains.
It means that it’s hydrophilic because things can’t dissolve in water when it’s hydrophilic
Answer:
Al₂O₃ + 6HNO₃ → 2Al(NO₃)₃ + 3H₂O
Explanation:
left side of arrow right side of arrow
Al 2 1
O 3 1
H 1 2
NO₃ 1 3
Al₂O₃ + 6HNO₃ → 2Al(NO₃)₃ + 3H₂O
now there are,
left side of arrow right side of arrow
Al 2 2
O 3 3
H 6 6
NO₃ 6 6
you have to try and multiply different numbers and stop when you have equal molecule on both sides of the arrow.
Answer:
d. Estrogen will bind to a receptor protein that enters the nucleus and activates specific genes.
Explanation:
Estrogens are small lipophilic molecules synthesized from cholesterol. This steroid hormone (estrogen) is able to directly enter into the cell nucleus to bind with their corresponding receptors. Subsequently, estrogen-receptor binding stimulates these receptors to form dimeric structures that bind to DNA and thus activate gene expression. Estrogen receptors interact with DNA and activate gene expression through zinc finger domains composed of four (4) cysteine residues surrounding a zinc atom.