1. A single-celled organism that lacks a membrane-bound nucleus, mitochondria, or any other membrane -bound organelle. Prokaryote
Eukaryote
Nucleus
Animal Cell

2.Which of the following is a function of the cell membrane?

breaks down lipids, carbohydrates, and proteins from foods
stores water, salt, proteins, and carbohydrates
keeps the cell wall in place
regulates the movement of materials into and out of the cell

3. What do Chloroplast and Mitochondria have in common?

They contain DNA
Provide energy to the cell
Are in charge in cell transport
Make proteins

4. How do the structures ribosomes and ER work together?

To synthesize lipids and modify toxic substances so that they are harmless
To synthesize and isolate proteins for distribution and use in the cell
To break down glucose in order to create ATP
RNA leaves the nucleus to be translated by ribosomes

i think its y= -4x-14

answer; both surfaces of the membrane are nonpermeable

estuaries are the partially enclosed coastal bodies of brackish water formed at the mouth of sea where river meets an ocean. it is a transition zone between river and sea water so estuaries are influenced to both marine environment such as tides, waves and to riverine such as flow of fresh water and sediments. the mixing of sea and fresh water provide high level of nutrients, making estuaries a high product habitats.

many estuaries suffers degradation from a variety of human activities like erosion from deforestation, overgrazing, overfishing, drainage and eutrophication.

so from the above statement answers will be

1. false as estuaries are formed due to both brackish and freshwater.

2.true, due to high productivity estuaries are breeding ground for many marine species.

3. direct and indirect activities of man that contribute to pollution and deposition of sediments.

yes we can.   a lady urinates from her urethra.