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GenaCL600 [577]
3 years ago
6

Can you plz answer this that will be lovely thank you (:

Biology
1 answer:
natta225 [31]3 years ago
4 0

Answer:

helium, lithium, boron,

Explanation:

sorry these are all I can think of right now

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What does absorption mean? A. breakdown of molecules B. enzyme activity on nutrients C. network of chemical reactions that occur
nordsb [41]

Answer:

It is B

Explanation:

Because absorption occurs when the simple nutrient molecules that result from digestion are absorbed into blood or lymph.

4 0
3 years ago
I need answers guys in biology billy bye genes
Maru [420]

Answer:

4: DNA is found in the nucleus of the cell

5: cell

6: A person has 23 pairs of chromosomes

7: Chromosomes, genes, DNA are different names for different parts of THE SAME thing

8: the genes that determine what you look like came from your PARENTS

9: the reproductive cells called SPERM AND EGGS each contain only 1/2 of the genes needed to make a person

10: All living things have the same genetic CODE

11: ATCG combine in different patterns to form different CHEMICALS

12: Each species has a different BLUEPRINT, but the same kind of DNA molecule

13: A(n) HORSE has 64 chromosomes

14: A chromosome can only be seen by using a MICROSCOPE

6 0
3 years ago
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.

5 0
3 years ago
Pseudomonas aeruginosa is a non-fermenting GNR, it grows on EMB. Which of the following would be true (Circle none, one or many)
Dafna11 [192]

Answer:

The correct answer is a. Pseudomonas aeruginosa would be colorless on EMB

Explanation:

Pseudomonas aeruginosa is a gram-positive bacteria that is rod shape. It shows a few nutritional requirements and can even adapt to those conditions in which the other bacteria can be adapt.

It is non-fermentative bacteria so it does not ferment lactose and other carbohydrates. As EMB agar contains lactose and some dye, therefore, the lactose fermenting bacteria ferment the lactose and show good growth and color change.

But as Pseudomonas aeruginosa is a non-fermentative bacteria it does not ferment lactose and does not show any color and forms a colorless colony. Therefore the correct answer is a.

7 0
3 years ago
Which factor has the greatest importance in determining the characteristics of an aquatic ecosystem?. a. day length. b. water de
IgorC [24]
The factor that has the most greatest importance in determining the characteristics of an aquatic ecosystem will be water depth. The depth will determine the sunlight that the ecosystem will get. The answer will be B. 
8 0
3 years ago
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