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hammer [34]
2 years ago
12

In which direction do arteries carry blood

Biology
1 answer:
nydimaria [60]2 years ago
6 0

Answer:

Arteries carry blood away from the heart

Explanation:

Veins carry the blood back to the heart.

Hope this helps!

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Watson and crick were the first to suggest that dna is
grin007 [14]

Answer:

they suggested that DNA could make exact copies of itself

Explanation:

The two had shown that in DNA, form is function: the double-stranded molecule could both produce exact copies of itself and carry genetic instructions.Watson and Crick developed their ideas about genetic replication in a second article in Nature.

7 0
2 years ago
A scientist can determine the accuracy of an hypothesis by which of the following actions?
bearhunter [10]
I would say C hopefully.
7 0
2 years ago
Explica como crees que se originó la vida sobre el planeta tierra
aleksandr82 [10.1K]
Sabemos que la vida comenzó hace al menos 3.500 millones de años, porque esa es la edad de las rocas más antiguas con evidencia fósil de vida en la tierra. Estas rocas son raras porque los procesos geológicos posteriores han remodelado la superficie de nuestro planeta, a menudo destruyendo rocas más viejas y creando otras nuevas (lo siento si es un amor incorrecto, marque como más inteligente si es correcto).
6 0
2 years ago
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1. Suppose the synthesis of an amino acid was accomplished by four enzymes encoded by four genes that formed an operon. Draw a m
vivado [14]

I have attached lac operon model having 4 genes. See attachment for better understanding.

Answer:

The Lac operon is controlled  by two signals.

Initiation

Glucose and lactose  concentrations control the initiation of  transcription of the Lac operon through  their effects on the Lac repressor protein  and Cap.

Lactose absent (Repression)

When lactose is absent, the Lac  repressor binds the Lac operator and shuts  off expression of the operon.

Lactose present (Transcription)

Addition  of lactose increases the intracellular  concentration of a related compound,  allolactose. allolactose binds to the  Lac repressor, causing it to undergo a  conformational change that releases its grip  on the operator DNa.

Glucose absent (Repression)

When  glucose is absent, cyclic aMp (red triangle)  is produced by the cell and Cap binds to  DNA.

Glucose present (Transcription)

LacZ, the first gene of the operon,  encodes the enzyme b-galactosidase, which  breaks down lactose to galactose and  glucose.

7 0
3 years ago
John's class has been studying blood type and donations John is not sure what blood type he has A dinner John asked him mom
Elodia [21]

Answer:

yes to mom will give him an allele for type A and hid Dad will give him

Explanation:

HOPE IT"S RIGHT

4 0
3 years ago
Read 2 more answers
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