BIOLOGY HIGH SCHOOL

The cell that does not have a cell wall is the _____.
human cheek cell
onion cell

Answers

Answer 1
Answer: A human cheek cell will not have a cell wall because cell walls are plant structures.
Answer 2
Answer:

Answer: The correct answer is for the blank is -

human cheek cell.

Cell wall can be described as a rigid layer, composed of polysaccharides (such as cellulose in higher plants) and presentoutside the cell membrane ( also called plasma membrane) in plants, fungi, and bacteria.

It is absent in animal cells, such as human cheek cells (where only cell membrane is present, surrounding the cytoplasm of cell).

Thus, human cheek cell does not contain cell wall.

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Membrane transport does not act totally independent of other modes of transport across the cell. This is evidenced by A. simple diffusion. C. osmosis. B. facilitated diffusion. D. cotransport.​
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which properties of water plays an important role in the movement of water from the roots to the leaves in plants?
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Which best describes the carrying capacity in an ecosystem?A. the number of organisms moving in and out of a population
B. the amount of habitat areas that are availabláin a given area
C. the amount of resources that are needed by a population of organisms
D. the number of individual organisms the environment can support in a given area

Answers

Answer:

b

Explanation:

the carrying capacity is how much so the amount of habitat space would be the capacity

Answer:

the number of individuals organism the environment can support in a given area

What happens to change young karst topography to mature karst topography?

Answers

There is a rapid change in the formation of the soluble rocks that occurs during this process from young to old (mature) karst topography. 

Hence, Karst topography is the formation of a landscape coming the disassembling soluble rocks like the gypsum, limestone and dolomite.

The three types of seismic waves produced by an earthquake are primary, secondary, and A. surface.B. sedimentary.C. elastic.D. atmospheric.

Answers

There are three types of seismic waves. These are classified on the basis of their penetration in the earth's surface and their arrival to seismographs. First are primary waves, which arrive first and penetrate the deepest. Then are the secondary waves, which penetrate less and arrive after primary waves. Finally are the surface waves, which do not penetrate the earth's surface and arrive the latest.

A. surface Waves......

hich takes places as a result of double fertilization in an angiosperm? Double fertilization produces a triploid zygote and diploid endosperm. Double fertilization produces a diploid zygote and triploid endosperm. Double fertilization produces a triploid zygote and a triploid endosperm.

Answers

Answer:

An ovary in an angiosperm flower contains one ovule, in which the cells divide to produce an egg and two polar nuclei. These egg and polar nuclei are haploid. The pollen grain introduces sperm cells which are also haploid. The two haploid sperm cells are introduced into the pollen tube  and finally reaches to the ovules.  The first sperm cell fuses with the egg and zygote form is diploid in ploidy. The second sperm cell will fuse with the two polar nuclei, and a endosperm form is triploid in ploidy.
Double fertilization in an angiosperm produces a diploid zygote and a triploid endosperm.

Which of the following is a nitrogenous base?A) ribose
B) guanine
C) enzyme
D) cysteine

Answers

Answer:

B) Guanine

Explanation:

The nitrogenous bases are guanine, adenine, cytosine, thymine, and uracil (for RNA).

Answer:

D

Explanation:

In the metric system, weight is a _____.-force
-mass
-pressure
-volume

Answers

in the metric system, weight is a force. 

Answer:

its a force

Explanation:
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A foreign seed is accidentally distributed in a field. After several growing seasons, the plants of the foreign seed are the only type found in the field. This foreign plant is considered which of the following?A. Secondary consumer B. Invasive species C. Mutualistic partner D. Producer
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