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Grace [21]
4 years ago
14

Which statement correctly describes a scientific theory?

Biology
2 answers:
MrRissso [65]4 years ago
6 0
I think b would be the correct answer. uhm, report my answer if b is incorrect
Zina [86]4 years ago
6 0
Correct answer to this question is B
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True or False: The modern plate tecctonic theory states that the Earth's outer layer, or lithosphere, is broken into several lar
OLga [1]

Answer:

False

Explanation:

its not the lithosphere, that's in the sky, its the crust thats broken into several large plates

8 0
3 years ago
explain how repressible and inducible operons differ and how those differences reflect differences in the pathways they control
Sonja [21]

Answer

Operons are cluster of coordinated genes, including structural genes, an operator gene, and a regulatory gene.

Explanation:

In the The repressible operons, The transcription is usually on and repressor is in inactive form, So the specific genes are transcribed. While a regulatory molecule act as corepressor and binds to repressor protein to activate it. The repressor protein cause the inactivation of repressible operon (as the name indicate). E.g., Tryptophan Repress the trp operon.

A high level of product act as regulatory molecule (Corepressor) and turn off the operon, So anabolic pathways or synthesis of essential components are controlled by repressible operon.

In the Inducible operons, the transcription is usually off and repressor is in active form. So there is no transcription of genes. Specific Metabolite cause the activation of operon  e.g lactose cause the induction of lac operon.

As a metabolite induces the operon, So they control the Metabolic pathways or breakdown of a neutrient.

7 0
3 years ago
Heart rate decreased suddenly and then MAP immediately fell because peripheral blood vessels were extensively vasodilated. The b
steposvetlana [31]

Heart rate decreased suddenly and then MAP immediately fell because peripheral blood vessels were extensively vasodilated.

Explanation:

A VO2 max test is a clinical test done in a lab and is the ‘golden standard’ for measuring the potential and cardio-respiratory endurance of athletes and bikers.

It measures the oxygen carrying capability through a graded step test which determines the average power output. The maximal oxygen uptake along with cardiorespiratory responses is measured.

As per exercise physiology, the heart rate and cardiac output increases with exercise. When the potential is less, the resistance decreases, heart rate and mean arterial pressure also decrease .

8 0
3 years ago
The four most common chemical elements found in living matter are
Romashka [77]

Explanation:

In all living system we can always find basic elements carbon, oxygen, nitrogen and hydrogen, carbon is the basic building unit contained in living matter. The percentage of carbon in the mass of living matter is 19.0% oxygen and hydrogen are present in almost all organic compound which creates living organisms.

5 0
3 years ago
Fill in each blank with the correct word.
Sergio039 [100]

Answer:

the male reproductive cell is called a(n) sperm

the female reproductive cell is called a(n) egg

when the male and female cells join during fertilization, a(n) embryo forms

Explanation

During a males life, the sperm forms. During a females life, the egg forms. When a man and a woman fall in love, the reproduce, causing the sperm and egg join to form a embryo

5 0
4 years ago
Read 2 more answers
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