Which of the following describes why ice floats? A-The density of ice is Higher than that of liquid water
b-The density o ice is lower than that of liquid water
C-The density of ice is the same as liquid water
D-None of the Above
Why is water vital to maintaining a constant internal enviorment
A-It is cohesive
B-It is Adhesive
C-It is a good solvent
D-It has a high specific heat
Which of the following is true about a solute
A-If forms a suspension
B-it dissolves a solvent
C-It cannot dissolve
D-It is dissolved by a solvent
Which of the following is true about an acidic solution
A-Its pH is below 7
B-Its hydrogen icon concentration is low
C-It is neutral
D-It can act as a buffer

Hey There!!~

Which of the following describes why ice floats?

Your answer is B. The density of ice is lower than that of liquid water. Because, As the water cools, the particles slow down and the bonds last longer. These bonds cause the water molecules within ice to form a lattice-like structure that is less dense than liquid water. So, ice floats on the more dense liquid water.

Why is water vital to maintaining a constant internal environment?

Your answer is C. It is good solvent. It is the maintenance of a constant internal despite changes in internal and external conditions. In the human body, this includes control of: blood glucose concentration.

Your answer is A. Its pH is below 7. Because, An acidic solution is one in which the concentration of hydronium ions is greater than that of hydroxide ions. This makes the pH less than 7. An acidic solution is an electrolyte and conducts electricity.

Hope This Helps!!

1) gene flow

- it is described as the transfer of genes from one population to another population so that frequency of gene is increased.

-a zebra migrates to join a different herd of zebras.

2) natural selection

- a mechanism of evolutionary change in which individuals with advantageous traits survive and reproduce whereas the others ( those that can not adapt) eliminate from the population.

-competition for sunlight leads to taller trees.

3) mutation

- permanent change in the nucleotide sequence of dna ( genetic material) that could have harmful or useful consequences.

-the dna of a snake changes to make its venom stronger.

4) genetic drift - it is a random phenomenon ( that occurs by chance such as fire) that results in change in the gene frequency in a small population.    

-a grassfire randomly sweeps through a population of buffalo and kills most of the animals.

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