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elena-s [515]
2 years ago
10

PLZZZ HELP MEEEE

Biology
1 answer:
sineoko [7]2 years ago
3 0

Answer:

Hello!!

1. Which of the following are in the correct order from least complex to most complex?

A. molecule-atom-tissue-cell-organ-system

B. cell-tissue-molecule-organ-atom-system

C. cell-tissue-organ-atom-molecule-system

<u>D. atom-molecule-cell-tissue-organ-system</u>

2. Which system consists of the kidneys, ureters, urinary bladder, and urethra?

A. digestive

B. endocrine

C. respiratory

<u>D. urinary</u>

<u></u>

3. What is the name for the material that goes from the glomerulus into Bowman's capsule of the nephron?

A. solvent

B. solute

<u>C. filtrate</u>

D. urine

4. What is the name for the process by which water and nutrients are moved from the nephron to the blood?

A. tubular filtration

<u>B. tubular reabsorption</u>

C. tubular secretion

D. tubular flow

5. What is the name for the capillaries that are surrounded by Bowman's capsule in the nephron?

A. alveolus

<u>B. glomerulus</u>

C. collecting duct

D. urethra

6. Which of the following should not be present in the filtrate in Bowman's capsule?

<u>A. proteins</u>

B. water

C. salts

D. glucose

7. What are the tubes that carry urine from the kidneys to the urinary bladder?

A. collecting ducts

<u>B. ureters</u>

C. urethras

D. nephrons

8. What is the main nitrogenous waste product that is eliminated in the human urine?

A. ammonia

B. water

<u>C. urea</u>

D. uric acid

Hope this helps!!

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In an electron cloud, an electron that is farther away from the nucleus has. a greater charge than an electron near the nucleus. a smaller charge than an electron near the nucleus. a higher energy than an electron near the nucleus.
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When put together, these bases (A,T,C,G) make up "sentences" that we call
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Answer:

Explanation:

ATCG are called the Nitrogenous Base. The DNA(deoxyribonucleic acid) is made up of a phosphate group, 5 Carbon sugar called deoxyribose and Nitrogenous base.

This Nitrogenous bases are further divided into purine and pyrimidine

Purine includes- Adenine and Guanine while pyrimidine includes Thymine and Cytosine or Uracil in the RNA.

When Base pair occurs, Adenine pairs with Thymine while Guanine pairs up with cytosine in DNA.

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1) How is DNA condensed to form a chromosome?
Bumek [7]

Answer:

1) DNA is wrapped around histone proteins to form chromatin

2) The genes are the functional units, the segments between them are used for regulation

3) The genetic code is the language used, gene expression is how the cell uses the information, the activity of the genes.

Explanation:

1) DNA forms a DNA/protein complex called chromatin. It does this by wrapping around histone proteins. These histone proteins are usually present in the form of a nucleosome, which is a unit containing 2 copies of 4 histones (H2A, H2B, H3 and H4). The chromatin fibre at its most compact forms tightly coiled structures called chromosomes. These structures are only present during cell division. When the cell is in interphase (i.e. not dividing), the chromatin is not as tightly condensed, and instead the chromatin is more relaxed to allow the genes within to be expressed.

2) Genes are the functional units that the cell uses to make RNA and protein. The genes are first transcribed into RNA, which is processed and then translated into a polypeptide chain, which forms a complete protein that performs activities in the cell/tissue/organism. However, the whole genome does not form genes, there are regions that do not correspond to a gene. These regions are called "non-coding DNA" or sometimes even "junk DNA". However, that does not mean that these regions do not have important roles. The role of this DNA is usually in regulating the activity of the nearby genes. This DNA might contain important regulatory sequences such as promoters/enhancers/silencers that control how the gene is used by the cell, by for example, recruiting transcription factors or silencing proteins.

3) The genetic code is the language used by the cell. It explains how the cell can transcribe the information in the DNA, to RNA, process the RNA, and then translate the RNA into a polypeptide, and eventually a mature protein. In contrast, gene expression represents how the cell actually uses this information. Not all the genes are transcribed at the same time, instead, the activity of genes is carefully controlled to produce appropriate gene expression patterns, allowing the cell to properly perform its functions. Gene expression is hugely different between cells in an organism, for example the gene expression patterns of a muscle cell will  be hugely different to that of a blood cell.

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ASHA 777 [7]

The farmer's action most likely have a negative impact on the ecosystem because may be there is no predator or controlling agent of that bird.

<h3>Why introduction of new bird cause problem?</h3>

We know that one organism is responsible for controlling the population of other organism so if such type of controlling agent is present, the organism grow rapidly and can harm the whole ecosystem.

So we can conclude that farmer's action have a negative impact on the ecosystem due to presence of no predator or controlling agent of that bird.

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6 0
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What is the mass of an element with 15 protons, 13 electrons, and 11 neutrons?
RSB [31]

Answer:

B. 26amu

Explanation:

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The mass number also called Atomic mass unit (amu) in this case, of an element is the sum of the proton number and the neutron number in the atom of that element. The mass number is denoted by A.

Hence, A = Z + N

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Z = Proton (atomic number)

N = Neutron number

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Hence, the mass number of the element in the question, in AMU, is 15 + 11 = 26amu.

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