Question

What does it mean for a membrane to be selectively permeable?
Only certain molecules are allowed to pass through.
The membrane is rigid and only allows water to pass through.
All types of molecules are able to pass into the cell.
The membrane is rigid and nothing can enter or leave the cell.

Answer 1

\(\small\rm\color{green}{It's~Your ~Turn~!}\) \(Try~!\)

Answer 2

Think if a membrane like a body guard type of doorman. Hes the one who only lets specific people in. and out. hes a selective doorman. what would your answer be?

Answer 3

Then newer is a?

Answer 4

right on! :)

Answer 5

answer*

Answer 6

During the light-dependent reaction of photosynthesis, light energy is converted into which form of energy?
chemical
mechanical
thermal
electrical

Answer 7

would you be so kind as to give a medal?

Answer 8

oh i think i know this

Answer 9

Absolutely, could help me with the questions I have left please?

Answer 10

yes i can

Answer 11

oh i had a project on this let me check it real quick

Answer 12

I think it's A

Answer 13

Yes youre right. it converts into atp and nadph, which are both chemical energy

Answer 14

heres the pic i had in my project

Answer 15

Why is the Calvin cycle considered a dark reaction?

Answer 16

Why is the Calvin cycle considered a dark reaction?
It occurs only at night.
It requires an absence of light.
It turns the plant dark green.
It can proceed in the dark.

Answer 17

The answer is D BECAUSE a dark reaction can either carry out at night or at daytime. it doesnt need sunlight because its not fueled with light. its energy source is CO2 from the air.

Answer 18

Which is true for both photosynthesis and cellular respiration?
They are simple chemical reactions.
They are complex chemical reactions.
They require light energy from the sun.
They require cells to use water.

Answer 19

so it can happen either in the dark or at night.

Answer 20

ok

Answer 21

hmm well im thinking the last one. photosynthesis does require water. but cellular respiration PRODUCES water.

Answer 22

Which statement best distinguishes plant cells and animal cells?
There are more ribosomes in animal cells than in plant cells.
Plant cells have more lysosomes than animal cells have.
Plant cells have large vacuoles, and animal cells do not.
The position of the nucleus in the cells is different in plants and animals.

Answer 23

cross out C because they both have vacuoles

Answer 24

I think its b

Answer 25

Is it right?

Answer 26

exactly. lysosomes are in animal cells. but they dont even exist in plant cells

Answer 27

WOAH wait i read that wrong

Answer 28

Are you gonna be online around 11 pm eastern time?

Answer 29

lysosomes are in animal cells but not plant cells so you gotta cross out B too

Answer 30

and no i dont think so why?

Answer 31

Because I just got to work, and I wondering if you could help me around that time

Answer 32

You have to review the information about transport mechanisms inside human body.
How molecules in the GIT pass to systemic circulation . Why some kinds of antibiotics can't pass through blood brain barrier. All these things are releated to the permeability of membranes . For example , if you have a water soluble molecule in human gut , the gut membran will not allow it to pass. Only hydrophobic molecules can pass through human gut. gut is a selective membran for lipid soluble molecules.

Answer 33

I think the best answer would be only certain molecules are allowed to pass through. :)