BIOLOGY COLLEGE

In multicellular organisms, such as human beings, cells combine to form tissues, which combine to form organs, which combine to form organ systems, which all together make up the organism and enable it to function. This is an example of which theme in biology? Select one: a. structure and function
b. unity and diversity
c. regulation
d. levels of organization​

Answers

Answer 1
Answer:

Answer:

d

Explanation:
Answer 2
Answer:

Final answer:

The situation described in the question is an illustration of the 'levels of organization' theme in biology, which elucidates how smaller units combine to create more complex structures like tissues, organs, organ systems, and ultimately, the whole organism.

Explanation:

The scenario presented in the question exemplifies the theme of 'levels of organization' in biology. This theme explains how simpler components combine and interact to form more complex structures. In the context of multicellular organisms, cells form the fundamental units, which combine to constitute tissues. Tissues further come together to form organs, and organs function together in organ systems to enable the entire organism to function properly.

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Original DNA coding strand: TAC CCG ACG GGC GAT AGT TTCDNA 1: TAC CCA CGG GCG ATA GTT TC

DNA 2: TAC CCG ACG GGC GAT AGT TTT

a) What types of mutation have occurred in each of the DNA 1 and DNA 2 sequences?
b) Explain how these mutations affect the amino acid sequence produced and the overall effect on the final protein. Which mutation will cause the most disruption to the overall protein structure and why?

Answers

A) DNA 1 by chromosomal mutation
DNA 2 by genetic mutation



Hope it’s usefullll

How many moles are in 17.13g of MgO

Answers

Answer:

0.4250 mol MgO

General Formulas and Concepts:

Chemistry - Atomic Structure

  • Reading a Periodic Table
  • Using Dimensional Analysis

Explanation:

Step 1: Define

17.13 g MgO

Step 2: Identify Conversions

Molar Mass of Mg - 24.31 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of MgO - 24.31 + 16.00 = 40.31 g/mol

Step 3: Convert

17.13 \ g \ MgO((1 \ mol \ MgO)/(40.31 \ g \ MgO) ) = 0.424957 mol MgO

Step 4: Check

We are given 4 sig figs. Follow sig fig rules and round.

0.424957 mol MgO ≈ 0.4250 mol MgO

Which statement best describes the limit of science

Answers

The Answer is: Science cannot answer philosophical questions.

Once a neuron is stimulated and the membrane potential is depolarized, the depolarized axonal membrane is helped to return to its resting potential by opening voltage-gated K+ channels, allowing K+ to flow out of the cell down its concentration gradient.(a) True
(b) False

Answers

Answer:

Explanation:

The cell membrane separates the cell from the outer environment. The extracellular fluid contains the sodium ions (Na+), chloride ions (Cl-), while intracellular fluid contains potassium (K +) and negative anions.

The potential difference arises when the membrane is selectively permeable to some ions. The resting potential is -70mV.  

When the neurons get excited, the sodium ions start to enter by sodium channels.  

Now there are more positive ions inside the cell membrane. It disturbs the resting potential i.e. -70mV. This stage is known as depolarization.

When the inside environment of the cell is more positively charged, the potassium ions start to move out of the cell. It goes out by the voltage-gated channels. Thus resting stage is maintained and it is known as repolarization.

But the initial stability of the cell membrane has to be maintained. To restore the resting stage, the sodium ions start to move out of the membrane and potassium ions enter into the cells again. This is an active transport and has done by the Na+ - K+ pump. Here 3 sodium ions move out and 2  potassium ions pumped into the cell through the plasma membrane.  

Thus the resting potential regains. The potassium ions come back into the cells against the concentration gradient and ATP provides the energy for this phenomena.

Answer:

False.

Explanation:

Neuron or nerve cell may be defined as the structural and functional unit of the nervous system. The neurons conduct the nerve impulse and helps in the transmission of signals.

The depolarization of the cell occurs due to the influx of sodium ions into the cell. For the cell membrane to be in resting potential, the potassium ions moves inside the cell from outside the environment and not out of the cell of the organism.

Thus, the correct answer is option (b).

What comments do these authors make concerning the relation of bases on one strand of the helix as compared to those on the other strand?

Answers

Answer:

See the answer below

Explanation:

Watson and Crick modeled the structure of the DNA as being made up of 2 strands with each strand composed of a long chain of nucleotide bases. The DNA. The 2 strands are said to be associated by a hydrogen bond and are twisted around each other in a ladder-like manner to form a helix structure.

Specifically on the bases, Watson and Crick modeled that the nucleotide bases component of one strand of a double helix DNA are complementary to the nucleotide bases of the other strand according to the base-pairing rule.

The base-pairing rule states that adenine always pairs with thymine while guanine always pairs with cytosine. This thus means that with the nucleotide sequence of one strand known, the sequence of the other strand of a double helix DNA can be determined.

Which disease is more contagious Ebola or Mumps?

Answers

Mumps is VERY contagious. However, ebola is not, even though it is dangerous. Therefore, it is mumps.
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