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3 years ago

The main difference between a prokaryotes and eukaryotes

Biology

2 answers:

blondinia [14]3 years ago

7 0

Answer:

Prokaryotes are single-celled and eukaryotes are multicellular. Prokaryotes are bacteria and don't have a nucleus but Eukaryotes are animals and they do have a nucleus.

k0ka [10]3 years ago

6 0

Answer:

eukaryote cells have a membrane -bound nucleus and prokaryote cells do not. the nucleus is where eukaryote ls store their genetic information and prokaryotes have no membrane bound organelles.

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Arid and semiarid lands are prone to desertification because c. The precipitation cannot meet the growing demand for water or d.

lyudmila [28]

C. The precipitation cannot meet the growing demands for water

3 0

3 years ago

Which is an arrangement of jeans consisting of an operator a promoter and a repressor

quester [9]

An operon is an arrangement of genes consisting of an operator, a promoter, and a repressor.

8 0

3 years ago

Plz help ASAP! THANK YOU

marysya [2.9K]

Answer:

According to the diagram, what is occurring in step 7 is cytokinesis, with the separation of two daughter cells, following cell division.

Explanation:

Cytokinesis is a process that occurs at the end of mitosis or meiosis, being the final step of cell division. This mechanism allows the separation of the two daughter cells, with equal distribution of cytoplasm and formation of cell membrane, differentiating into two independent cells.

In the diagram it can be observed (step 7) that after the division process —in yellow— two arrows pointing to two cells are evident, which implies the process of cytokinesis.

Prior to the cytokinesis process, karyokinesis occurs, which is the separation of nuclei and formation of the nuclear membrane.

In animal cells, karyocinesis occurs by the effect of a ring of actin and myosin that helps to force the separation. In the plant cell, the fragmoplast is formed, a septum that induces the separation of the daughter cells.

The other options are not correct because:

Cell growth occurs in G1 phase.
Cell preparation occurs in interphase.
DNA replication occurs in S phase.
Mitosis is represented in yellow, and involves 4 phases.

4 0

3 years ago

E)Name the force provided by the leaves of tall trees which draws more water due to adhesion.

Gwar [14]

Answer:

Capillary action

Explanation:

Capillary action helps bring water up into the roots. With the help of adhesion and cohesion, water can work it's way all the way up to the branches and leaves. Read on to learn more about how this movement of water takes place.

3 0

3 years ago

How can this PLR (pupillary light reflex) help you determine whether the lesion is in the eye itself or elsewhere?

Contact [7]

Answer:

Pupillary light reflex refers to the contraction that the pupils present when they light up. In cases of injury to the optic nerve, when the eye where the injured optic nerve is illuminated, since it cannot conduct the stimulus to the brain, neither pupil closes.

Explanation:

Pupillary light reflex refers to the reaction that causes the pupil to close with light thanks to the contraction of the sphincter of the pupil and to open in the dark thanks to the relaxation of that muscle by not receiving any stimulus. A light stimulus reaches the eye and in the retina it is transformed, through a chemical reaction, into an electrical stimulus that will be transmitted through the optic nerve and the visual pathways to the brain. The visual cells of the retina, rods and cones, also act as light receptors that control the pupil's motor activity. Thus, pupil-motor thresholds to light follow the same spectral sensitivity deviations as visual thresholds, which are a function of the state of light adaptation of the retina.

4 0

2 years ago