Neutrons are also known as what

Describe at least two ways that carbon can get from seashells to the atmosphere

Sedaia [141]

Answer:

Two ways carbon can get from seashell to the atmosphere is through limestone, lithosphere,volcano,+atmospheric co2.
the second way to get there would be through the oceanic co2,marine animals+ plants ,sediments ,natural gas,power plants and then atmospheric CO2.

Explanation:

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8 0

3 years ago

Compare the functions of the circulatory, respiratory, and nervous system in gas exchange

kow [346]

Answer:

Functions of the circulatory, respiratory, and nervous system in gas exchange are interconnected with each other in the following manner:

The circulatory system is responsible to pumps blood around the body. The circulation system allows the absorption of oxygen and releases carbon dioxide in the lungs and the Respiratory system also take oxygen in and releases carbon dioxide. The circulatory system and respiratory system work hand in hand. The brain or nervous system monitors gas or oxygen level in blood and regulates respiratory rate.

8 0

3 years ago

Describe the events that happen during the following phases of photosynthesis:

jarptica [38.1K]

Answer:

Photosynthesis consist of two types of reaction 1 light dependent reaction 2 light independent reaction or dark reaction.

Explanation:

light dependent reaction

light dependent reaction or light reaction occur in the thylakoid of granum of chloroplast.During light reaction light energy is absorbed by various pigments of the photosystem and is finally converted into chemical energy.

During light reaction water is split in presence of sunlight to form H+ and OH- ions.The OH- ions releases electron.The released electron is then transported through various electron carriers resulting in the formation of ATP molecule by cyclic photo phosphorylation and NADPH by noncyclic photophosphorylation.

Light independent reaction

Light independent reaction or dark reaction occur in the stroma of chloroplast.The ATP and NADPH that is formed during light reaction is used as 3:2 ratio for per molecule of glucose production.

7 0

3 years ago

A multigravid client in labor at 38 weeks' gestation has been diagnosed with rh sensitization and probable fetal hydrops and ane

alexandr1967 [171]

The fetal heart rate which will be of most concern to the nurse is the SINUSOIDAL PATTERN HEART RATE.
This is because, a sinusoidal pattern heart rate is an indication that the autonomic nervous control that ought to control the fetal heart rate is absent due to serious lack of oxygen at the tissue level. RH sensitization, fetal hydrops and anemia are usually associated with sinusoidal pattern. In order to improve the fetal outcome in this case given above, cesarean section should be considered for the patient\.

7 0

3 years ago

For this assignment you will complete an illustration(s) (by hand) of how the lac operon works. You should be sure to include de

Fantom [35]

<h2>Lac operon </h2>

Explanation:

Lac operon present in prokaryotic chromosomes whose product involves in transportation and catabolism of lactose

Lac operon consists of three structural genes called Lac Z,Lac Y and Lac A and a regulatory element(promoter and operator)
Lac I gene is present outside the Lac operon,act as regulatory gene and control the expression of Lac operon genes
Lac Z codes for β galactosidase which converts lactose into allolactose
Lac Y codes for Lac permease which act as a membrane transporter and transport lactose into the cells
Lac A codes for transacetylase which neutralize the toxic effects of lactose

Lac operon in absence of lactose

In absence of lactose Lac operon exists in switch off state
Lac I gene produces Lac repressor which binds to operator region and prevent binding of RNA Polymerase thus blocks transcription

Lac operon in presence of lactose

In presence of lactose Lac operon exists in switch on state
In presence of lactose few molecules of Lac operon enzyme catalyse conversion of lactose to allolactose
Allolactose act as an inducer,binds to the Lac repressor and induce conformational changes causing dissociation of Lac repressor from operator
In absence of Lac repressor RNA Polymerase binds to the promoter and starts transcription of genes which catabolize lactose

Lac promoter is a weak promoter and direct transcription of Lac operon genes in very low level in presence of lactose

For higher level expression of Lac operon genes,operon system require conversion of weak promoter to strong promoter which is always mediated by catabolite protein-cAMP complex(CAP-cAMP complex)
CAP cAMP complex binds to the upstream of promoter called CAP binding site and stimulate expression of Lac operon genes by facilitating binding of RNA Polymerase
Catabolite activator protein(CAP) or cAMP receptor protein(CRP) activate when cAMP binds
cAMP is a secondary messenger synthesized from ATP and act as co-activator of CRP
With respect to CAP cAMP complex Lac operon system is positively controlled
In prokaryotic cell cAMP is very low when glucose concentration is relatively high and vice versa
At high concentration of glucose the growth rate is maximum and lactose catabolism is repressed called catabolite repression

6 0

3 years ago