<h3><u>Answer;</u></h3>
Ducts
Right subclavian vein
Left subclavian vein
The purified lymph, with lymphocytes and antibodies added, returns to the <u>Ducts</u> when it leaves the lymphatic ducts. the right lymphatic duct empties the purified lymph into the <u>right subclavian vein</u>, and the thoracic duct empties into the <u>left subclavian vein</u>.
<h3><u>Explanation</u>;</h3>
- <em><u>Lymph is a thin, watery fluid composed of intercellular fluid. The fluid circulates through the lymphatic system and is responsible for the removal of interstitial fluid from tissues.</u></em>
- During circulation, the small, open ended lymph vessel known as lymphatic capillaries pick up the lymph at the tissues throughout the body. These capillaries join together to form larger lymphatic vessel that passes through the lymph nodes. At the lymph nodes, several substances such as carbon, cancer cells, pathogens and dead blood cells are filtered out.
- Other function of lymph include; transport and absorption of fatty acids and the transport of white blood cells from the lymph nodes.
A researcher wants to determine if ponds and lakes downwind of a coal-burning power plant are affected by the plant’s emissions. The best parameter from the water in the ponds and lakes to measure in order to determine the effect of the plant’s emissions on the aquatic ecosystems is
<u>A) pH</u>
Explanation:
- PH stands for Potential of Hydrogen. It refers to the hydrogen ion concentration in a solution.
- The majority of aquatic creatures prefer a pH range of 6.5-9.0, though some can live in water with pH levels outside of this range. Aquatic pH levels. The optimum pH levels for fish are from 6.5 to 9.0. Outside of optimum ranges, organisms can become stressed or die.
- It is the measure of the acidity or alkalinity of a solution. The PH value ranges from 0 to 14 on a pH scale.
- pH can be measured by measuring the voltage produced between two special electrodes immersed in the liquid solution. One electrode, made of a special glass, is called the measurement electrode.
- PH is zero that means hydronium ion concentration is zero and pH is 14 that means hydronium ion concentration is 1.
- Acids and bases have various strengths, all depending on their pH . An extremely strong base would be more dangerous than a weak acid, and vice versa.
Answer:
The correct answer is a inducer(lactose) = acts by stepping on the gas pedal.
Explanation:
In lac operon lactose act as an inducer.Lactose exerts its action by binding with the repressor and inducing a conformation al change in the repressor molecule and prevent the later from binding to the operator region.
This ultimately result in the expression of the structural genes such as Lac Z ,Lac Y and Lac A.
According to the given question if the lac operon is described using a car analogy then the inducer lactose will act by stepping on the the gas pedal and this is the positive regulation of Lac operon.
So if there isn’t an o blood type, I’m assuming the offspring is homozygous for their blood of types. If we do a chart we will see that the only possible blood type for the offspring is AB. hope this helped
A A
B. AB. AB
B. AB. AB
Some of the equipment the student can use are:
Nets
Underwater cameras
pH indicators
among others.
<h3>What does the student want to study?</h3>
The student wants to find out if there are invertebrates and fish or if the conditions of the pond would support these types of organisms.
<h3>What does the student need to do?</h3>
In this situation, there are two main approaches:
- Study invertebrates and fish: This approach implies finding out if there are already invertebrates and fish in the pond, to do this, the student can
- Directly observe organisms by using a special camera.
- Use a net to catch organisms in the pond and then classify the organisms.
- Study the conditions: This approach implies determining if the pond has the conditions for invertebrates and fish to live. To do this, the student will need to measure conditions such as:
- Nutrients in the pond.
- Temperature.
- Ph.
This will require equipment such as pH indicators.
Learn more aobut pH in: brainly.com/question/491373