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3 years ago

Check my answer?

2 answers:

7 0

Answer: The correct answer is B) Plant cells have cell walls containing cellulose, and animal cells lack a cell wall.

Plant and animal cells both are eukaryotic cells. A typical characteristic that distinguishes plant cell from animal cell is the presence of cell wall in plants, which is absent in animal cells.

Cell wall is the outermost layer that surrounds the plasma membrane of the cell in plants. Plant cell wall is made up of cellulose and provides rigidity and structural support to the cell.

Cell wall is absent in animal cells. Only plasma membrane is present in them.

Thus, B) is the right answer.

Goshia [24]3 years ago

5 0

Yea you are right. Animal cells do not have cell walls though plant cells do have cell walls

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Why does secondary session occur faster them primary secession

Gre4nikov [31]

Answer:

During secondary succession, the soil isn't damaged hence there is no need for pioneering species such as lichens to dissolve the damaged soil into organic ones that can sustain more complex plants.

Explanation:

Secondary succession, type of ecological succession (the evolution of a biological community’s ecological structure) in which plants and animals recolonize a habitatafter a major disturbance—such as a devastating flood, wildfire, landslide, lavaflow, or human activity (e.g., farming or road or building construction)—significantly alters an area but has not rendered it completely lifeless. Secondary succession is distinguished from primary succession, in which a biological community develops where no life had existed

Secondary succession follows a major disturbance, such as a fire or a flood. The stages of secondary succession are similar to those of primary succession; however, primary succession always begins on a barren surface, whereas secondary succession begins in environments that already possess soil. In addition, through a process called old-field succession, farmland that has been abandoned may undergo secondary succession.

Secondary succession takes place where a disturbance did not eliminate all life and nutrients from the environment. Although fire, flooding, and other disturbances may bring visible ruin to a landscape, drive out many plants and animals, and set back the biological community to an earlier stage, the habitat is not lifeless, because the soil retains nutrients and seeds that were set down before the disturbance occurred. Buried seeds can sprout shortly after the effects of the disturbance pass, and some may have greater success from reduced competition and reduced shading. Some species may be adapted to the frequent passage of a particular disturbance. For example, the jack pine (Pinus banksiana), a tree species common in the northeastern U.S. and Canada, requires heat from a wildfire to open its cones (strobili) before seeds can be spread for new growth.

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3 years ago

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Solnce55 [7]

Nucleus. The answer is this because:
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3 years ago

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3 years ago

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Explanation:

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1 year ago

Match the function with the cell part. Part A1. You will use each term only once. 2. Contains DNA and directs synthesis of RNA 3

EleoNora [17]

Answer:

1. Contains DNA and directs synthesis of RNA B. Nucleus 

2. Photosynthesis - make energy H. Chloroplast

3. Protein synthesis and folding D. Rough ER 

4. ATP production, cellular respiration A. Mitochondria 

5. Transport molecules around cell C. Vesicle 

6. Functions in storage and digestion F. Vacuole

7. Lipid and carbohydrate synthesis  E. Smooth ER 

8. Modifies, sorts, tags, packages, distributes proteins G. Golgi Apparatus

Explanation:

The cell is the functional unit of all living organism, it´s enclosed by a MEMBRANE in animals, or by a CELL WALL in plants and it´s formed by several organelles that are dispersed in the intracellular fluid or CYTOPLASM, positioned along the CYTOSKELETON, which gives structural integrity to the cell. Vacuoles, Chloroplast and Cell wall are found in plant cells. Each organelle has a distinct function within the cell:

Nucleus - Contains DNA and directs the synthesis of RNA.

Chloroplast - Photosynthesis - make energy.

Rough ER - Protein synthesis and folding.

Mitochondria - ATP production, cellular respiration.

Vesicle - Transport molecules around cell.

Vacuole - Functions in storage and digestion.

Smooth ER - Lipid and carbohydrate synthesis.

Golgi Apparatus - Modifies, sorts, tags, packages, distributes proteins.

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3 years ago