Can u answer these 4 biology questions?

Question

1)Both lipids and carbohydrates are important in animal cells because both
a)store energy
b)contain nitrogen
c)form cell walls
d)provide insulation

2)many generation,unrelated or distantly related species may come to resemble each other due to
a)similar environmental factors
b)similar genetic mutations
c)homologous structural adaptations
d)competition with each other

3)bilogy class of 24 students decies to measure height of each student and then calculate the average height for the class.which of these is a possible source of error in this activity?
a)accuracy of making and recording measurements
b)total number of students in the class
c)the number of males and females in the class
d)difference in the ages of the students in the class

Answer 1

1 (a)
Carbohydrates and Lipids do not always contain nitrogen (mostly they don't). They are both used in formation of cell MEMBRANES. Phospholipids (rather than lipids per se) make up the cell membrane proper and carbohydrates are often attached to the outside. Carbohydrates are not used as an insulation material.

2 (a)
This is called convergent evolution

3 (a)

Answer 2

1 (a)

2 (a)

3 (a)

Answer 3

1.) A
2.) A or B because genetics and environment can have affect on the formation of phenotype
3.) A

Answer 4

1) a
2)'MAY' be all of the above
3a

Answer 5

ABC.....

trust me my dear

Answer 6

a
a b or c..
a

Answer 7

a, b, a?