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denis23 [38]
3 years ago
13

Cells within organisms often need to communicate and work together to carry out life's processes. Which of the following enables

cells to communicate?
Biology
1 answer:
LenKa [72]3 years ago
7 0
There are many different ways that cells can connect to each other. The three main ways for cells to connect with each other are: gap junctions, tight junctions, and desmosomes. These types of junctions have different purposes, and are found in different places.
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Which is the best hypothesis for the scientific question How does light intensity affect the rate of photosynthes 57
LuckyWell [14K]

Explanation:

A hypothesis mustn't be too detailed since you are about to take the experiment and not sure of the outcome so we have to stick with Light intensity has an impact on the rate of photosynthesis.

Hope it helps.

3 0
3 years ago
Enzymes function most efficiently at the temperature of a typical cell, which is 37 degrees celsius. increases or decreases in t
Zepler [3.9K]
Homeostasis is very important and your body function or the enzymes here because of your body being in homeostasis. If increase or decrease in temp, your body will halt all processes and try to readjust your body back to normal first because if not, then a lot of other processes would be affected negatively as well and you could potentially get ill.
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3 years ago
A minimum change in sensory intensity that is noticeable to an observer and can be coded into neural messages is known as the
AURORKA [14]
Difference threshold is a minimum alteration in sensory intensity that is noticeable to an observer and can be coded into neural messages. Different threshold is the lowest level of encouragement that is essential to sense that a modification has happened the difference in the intensity between two stimuli that is necessary to yield a just notable difference also known as JND. The just notable difference depends not only on the intensity of the new stimulus but also on the level of stimulation already present which is the more intense the existing stimulus the larger the change must be to be noticeable. 
6 0
3 years ago
Identify the parts of a leaf that make up it's transport system
Rashid [163]
Blade
Thin, flattened section of a plant leaf that collects sunlight

Petiole
Thin stalk by which a leaf blade is attached to a stem

Mesophyll
Specialized ground tissue that makes up the bulk of most leaves; performs most of a plant's photosynthesis

Palisade Mesophyll
Layer of tall, column-shaped mesophyll cells just under the upper epidermis of a leaf

Spongy Mesophyll
Loose tissue beneath the palisade layer of a leaf

Stoma
Opening in the underside of a leaf that allows carbon dioxide and oxygen to diffuse into and out of the leaf

Guard Cell
Specialized cell in the epidermis of plants that controls the opening and closing of stomata by responding to changes in water pressure

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Loss of water from a plant through its leaves

(Got this from my textbook so here)
3 0
3 years ago
Which of the following statements about excision repair is correct?
maxonik [38]

Answer:

a. True, b. False, c.True, d. True

Explanation:

a. Base excision repair is started by a DNA glycosylase  that recognizes the changes and removes the altered base by cleavage of the glycosidic bond binding the base and the deoxyribose sugar together.

b. Nucleotide excision repair works by a cut-and patch mechanism that removes their heavy lesions, including pyrimidine dimers and nucleotides . Endonucleases are responsible for the lesion of the damaged strand.

c. Nucleotide excision repair  is initiated by the proteins namely UvrA, UvrC, and UvrB in Escherichia coli.

-UvrD (helicase II) later removes the damaged strand

-DNA polymerase I (PolI) fills in the resulting gap.

d. DNA glycolases removes the damaged nitrogenous base.

-It leaves the sugar-phosphate backbone intact and thus creating an  apurinic/apyrimidinic site, which is commonly referred to as an AP site.

e. Xeroderma pigmentosum complementation group A(XPA)

-This is an essential protein in the nucleotide excision repair pathway.

- It helps to make a pre-incision complex along with other proteins.                

4 0
3 years ago
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