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maw [93]
3 years ago
13

The human embryo goes through a stage where it has gills and a tail, similar to a fish. Where do the gills go as the embryo deve

lops?
Biology
1 answer:
Sauron [17]3 years ago
3 0

Answer:

The "gills" and "tail" disappear before birth. Simple

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What are functions of the nervous system
julia-pushkina [17]

Answer:

The three main functions of the nervous system is motor, sensory and integration.

3 0
2 years ago
¿cuales son las diferencias de sangre y linfa?
Soloha48 [4]
La linfa carece de células, está constituida por un líquido incoloro y cargada de lípidos y lípidos que provienen del interior de las células, también contienen solamente glóbulos blancos. La función de la linfa es proteger al organismo de los agentes patogenos y trasladarlos a la sangre a fin de que esta los transporte al exterior del organismo.
La sangre tiene color rojizo, contiene células: leucocitos, hematies, minerales, vitaminas, hormonas, plaquetas, agua, oxígeno y dióxido de carbono. Su función es transportar todos los elementos necesarios a la célula y recoger de esta los residuos resultado de sus funciones de mantenimiento celular
6 0
3 years ago
What is different concerning the dna in bacterial cells as opposed to eukaryotic cells?
-BARSIC- [3]
What is different concerning the DNA in bacterial cells as opposed to eukaryotic cells
o The amount of DNA present, whether the DNA is housed in a nucleus or not, and whether the DNA is linear or circular
• Which of these statements is true regarding cell division in the body of a growing teenaged human?
o Only a subset of cells is dividing at this point o We grow by cell division, but not all of our cells are dividing
• Dividing cells must copy their DNA
( replication ), segregate DNA and other cellular components during
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• Our chromosomes exist as many sets of similar pairs with the EXCEPTION of our sex chromosomes o the sex chromosomes of the human female are also pairs. It is the X and Y of the male that break this rule •

6 0
3 years ago
Normally, only female cats have the tortoiseshell phenotype because _____
Ksivusya [100]
<span>The answer to this question would be: a male inherits only one allele of the X-linked gene controlling hair color

Tortoiseshell phenotype appears when a cat has two different X-linked gene that controls hair color. This result as a combination of hair color. Male cat sex gene is XY. Normally male cat only has 1 X gene, thus only have 1 color and can't have tortoiseshell phenotype unless there is pathological multiplication in X gene.</span>
5 0
3 years ago
2. Describe how the lac operon functions, and explain how it permits E.
MAXImum [283]

Answer:

The lac operon is an operon, or group of genes with a single promoter (transcribed as a single mRNA). The genes in the operon encode proteins that allow the bacteria to use lactose as an energy source. coli normally metabolise glucose, but if glucose is not available in a new environment, the lac operon can allow E. coli to metabolise lactose, the sugar found in milk using the structural genes beta-galactosidase and lactose permease. The lac operon of E. coli contains genes involved in lactose metabolism. ... It normally blocks transcription of the operon, but stops acting as a repressor when lactose is present. The lac repressor senses lactose indirectly, through its isomer allolactose.

Explanation:

7 0
3 years ago
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