There are different mechanisms for transport of molecules across the cell membrane. One kind of this transport is facilitated diffusion, this is a form of passive transport, not requiring any ATP (the opposite would be active transport, where it does require ATP.

Simple diffusion does require special transport proteins, and neither does osmosis. Filtration is a technique used for sterilisation of water, where any impurities can be drawn out of the liquid

6 0

2 years ago

Question 1: Some cells produce and secrete high levels of digestive proteins. Which organelles would you expect to be abundant i

Bumek [7]

Answer:

q1 : ribosomes because they are responsible for protein synthesis

q2 : by transporting potassium ions into the cell and sodium ions out of the cell maintaining a concentration gradient

q3 : seawater contains a high concentration of sodium and chlorine ions that the Atlantic cod gets rid of by actively transporting them out of its body

8 0

2 years ago

A male is heterozygous for the trait that produces freckles on the skin, and he has freckles. if he marries a woman who is also

kakasveta [241]

F- allele for freckles
f- allele without freckles

1) The man is heterozygote and has freckles, its indicating that the allele for freckles is dominant.
A cross between him and a woman who is also heterozygote: Ff x Ff
it would result in the following probabilities:
- 1/4 - homozygote with freckles: FF
- 2/4 - heterozygote with freckles: Ff
- 1/4- homozygote without freckles:ff

Their son would have a probability of 75% of being born with freckles.

2) The cross resulted in this probabilities:
- 1/4 - homozygote with freckles: FF
- 2/4 - heterozygote with freckles: Ff
- 1/4- homozygote without freckles:ff
So, the chance of being born heterozygote for this gene is 2/4, which is the same as half (50%).

6 0

2 years ago

Forests provide many different type your answer... for plants and animals.​

Forests provide many different type your answer... for plants and animals.