All categories

4 years ago

What is the definition for "hypothesis"?

Biology

2 answers:

Feliz [49]4 years ago

5 0

Answer:

C.) a possible explanation or answer to a scientific question that is based on prior knowledge or research and is testable

Hope this helps!

astra-53 [7]4 years ago

3 0

Answer:

C.) a possible explanation or answer to a scientific question that is based on prior knowledge or research and is testable

You might be interested in

If someone with auburn hair has children with someone with red hair (but whose mother had black hair ) what are the genotype and

tensa zangetsu [6.8K]

The phenotype is - 75 % red and 25 %brown.

The genotype is hRhR - 25%

hBkhR - 50%

hBrhBk - 25%.

<h3><u>Explanation:</u></h3>

The cross given here is a simple dominant - recessive relationship between the three types of alleles of hair colour. The genes of this characteristics are present in autosomes, so will be segregated equally among all the sexes of the offsprings.

Now the genotype of auburn and red with black mother is given. So during gametogenesis, the gametes from the parents will be

Father - hBr and hR

Mother - hBk and hR

So, the probable combinations are hBrhBk, hBrhR and hBkhR.

The frequency of the combinations are 25%, 25% and 50% respectively.

The phenotypic ratio will be red : brown as 3:1.

6 0

3 years ago

Explain how the circulatory system is able to transport the blood under high pressure from the heart to the rest of the body

expeople1 [14]

Transport of blood under high pressure is done through the concerted efforts of the heart and arteries.

<h2>The circulatory system is the network of the heart, arteries, veins, and capillaries responsible for the movement of blood around the body.</h2>

Transporting blood under high pressure can be explained in the following steps:

Contraction of the heart ventricles creates blood under high pressure
High pressured blood is removed from the heart through the arteries. In addition, the arteries are able to contract and expand, thus are elastic
The lumen of the arteries is narrow thus helping in maintaining high pressure

As a result of the above, the high pressure of blood is maintained and transported to the extremities of the body.

To learn more about the circulatory system see: brainly.com/question/3305440?referrer=searchResults

SPJ12

6 0

2 years ago

Natural, opiate-like neurotransmitters linked to pain control are called

Levart [38]

They're called endorphins!

4 0

4 years ago

What organisms comprise the invertebrate chordates?

Solnce55 [7]

The invertebrate chordates include Tunicates and lancelets.

<h3>What are invertebrate chordates?</h3>

They are a group of chordates that possess notochords somewhere in their life span but end up not possessing the vertebral column. They possess all the characteristics of chordates.

Invertebrate chordates include the Urochordata which are the Tunicates and the Cephalochordata which are the lancelets.

More on invertebrate chordates can be found here: brainly.com/question/1969651

#SPJ9

5 0

2 years ago

Select the correct answer from each drop-down menu. rna interference is a mechanism of eukaryotic gene regulation. in this mecha

rosijanka [135]

The dicer enzyme processes dsRNA and forms siRNAs, which suppress the expression of target genes by cutting mRNA. 1) siRNA 2) RNA.

<h3>What are siRNA fragments?</h3>

siRNA means small interfering RNA. This is a silencing RNA molecule involved in the RNA interference mechanism, intervening in the expression of a specific gene.

siRNAs are complementary double-stranded RNA molecules composed of about 20-21 nucleotides. siRNA originates from a long double-stranded RNA (dsRNA).

The dicer enzyme cuts dsRNA molecules and produces siRNA. siRNAs suppress the expression of target genes when cutting messenger RNA.

siRNAs suppress the expression of target genes by cutting the complementary messenger RNA (mRNA) into two halves. This is accomplished by the interaction of the siRNA with the RISC complex (RNA-induced silencing complex).

The two mRNA halves are later degraded by the cellular machinery, leading to the suppression of the gene expression.

siRNAs also participate in other pathways related to RNAi, such as in antiviral defense or in the chromatin structure organization.

RNA interference is a mechanism of eukaryotic gene regulation. In this mechanism, the enzyme dicer cuts dsRNA into smaller fragments called (1) siRNA, which form a complex with RISC and degrade specific (2) RNA.

You can learn more about siRNA at

brainly.com/question/7508257

#SPJ1

5 0

2 years ago