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4 years ago

Difference between xylem and phloem

1 answer:

7 0

That xylem is the substances that feed the plant, the substances that go from the dirt to the plant's body; and the phloem is the substance that goes from the pant to the ground, it's like the excretion of the plant. It's like the xylem goes up and the phloem goes down. The xylem usually is composed by Na, K and other substances that need the plant to live.

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Why do monosaccharide sugars burn faster than polysaccharides?

Afina-wow [57]

Answer:

Explanation:

This is because they are simpler molecular structure,with C-H bonds compare to polysaccharides which are aggregate of monosaccharide formed by glycosidic bonds.(covalent bonds) through condensation(This is the loss of OH and H from sugar molecules involved) the differences in strength of the two bonds is the reasons.

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4 0

3 years ago

The typical state of a neuron is the _____ potential, but when electrical signals stimulate it to its threshold, the _____ is im

Fudgin [204]

Answer:

The typical state of a neuron is the resting potential, but when electrical signals stimulate it to its threshold, the action potential is immediately observed.

Explanation:

The capacity for rest shows what occurs when a neuron is at rest. A capacity for action takes place when a neuron passes information down an axon, far from the cell body. When depolarization exceeds approximately -55 mV a neuron can activate the capacity for action.

Sodium-potassium valves start moving two potassium ions within the cell as three sodium ions are poured out to keep the negatively charged membrane within the cell; this keeps the resting potential in place.

7 0

3 years ago

A gene includes the sequence AGAACT. When it is transcribed, what will the RNA sequence be? A. UCUUGA B. UGCCGU C. UCUUTC D. TCT

Margaret [11]

Answer:

Explanation:

The correct option would be A.

According to the base-pairing rule, Adenine (A) always pairs with Thymine (T) (or Uracil in the case of RNA) while Guanine (G) always pairs with Cytosine (C).

Hence;

A-U

G-C

A-U

C-G

T-A

Therefore, AGAACT would be transcribed to UCUUGA.

8 0

3 years ago

Nuclear energy is a useful source of power but has disadvantages. What is a disadvantage of nuclear energy?

exis [7]

Answer:

Despite a generally high security standard, accidents can still happen. It is technically impossible to build a plant with 100% security. A small probability of failure will always last. The consequences of an accident would be absolutely devastating both for human being as for the nature.

Nuclear power plants as well as nuclear waste could be preferred targets for terrorist attacks. No atomic energy plant in the world could withstand an attack. Such a terrorist act would have catastrophic effects for the whole world.

4 0

4 years ago

Read 2 more answers

Please help me with this biology thing.

OverLord2011 [107]

Answer:

Answer:

a)dd

b) dd

c) 0%

a) 25%

b) 75%

c) 25%

a) 03

b) 0

c) tt

a) FF x ff OR FF x Ff OR FF x FF

b) Because all the children have freckles

3 0

3 years ago