Primary succession ________.a. is caused solely by human events
b. occurs on preexisting soil
c. occurs in areas without soil
d. becomes normalized by climax species

Answers

Answer 1

Answer:

Primary succession occur in areas without soil.

What is primary succession?

It is a ecological succession that begins in a lifeless area, such as a regions that has no soil or soil of which is not able to sustain life.

What is ecological succession?

It is the process by which structure of a biological community evolves over time.

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Answer 2

Answer: Primary succession C.occurs in areas without soil.

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(a) It is possible to measure a patient’s heart rate by either palpating their peripheral pulse, by observing their ECG, or by listening for the lub-dup through a stethoscope. However, patients with atherosclerosis of the femoral artery may not have a pulse in the popliteal artery or dorsalis pedis of the foot. Does this mean that they will also lack a heart beat (lub-dup) or QRS complex? Explain the relationship between a heart beat, pulse, and QRS complex. (B) Why is there a delay between systole of the ECG and the resulting pulse felt in the finger (R-Pulse)?

Answers

b)When you listen to the heart sounds, you are hearing the flow of blood which stops abruptly when a heart valve closes. This produces the "lub-dub" sounds. 1st heart sound (when the Mitral Valve closes) as the ventricle contracts (systole) and then 2nd heart sound (when the Aortic Valve closes) and the ventricle starts to fill again (diastole)
The pulse is the wave of pressure you can feel through the artery walls. This denotes systole.
The ECG's QRS complex is the electrical signal that tells the Ventricles to contract. You can see that the QRS occurs right at the beginning of systole and triggers Isovolumetric contraction.
So the QRS on the ECG, the pulse wave you can feel (ie. the rise in aortic pressure) and the 1st heart sound all signify SYSTOLE.
there a delay between systole of the ECG and the resulting pulse felt in the finger (R-Pulse) because it takes a little bit of time for the pressure to transmit through the body, as the finger is not on the heart (if it was there would be no delay)

Water is drawn upward from the roots through plant tissue to the leaves by

Answers

water exaporates frm the leaves and other parts of the plant above the ground. The evaporation of water from the plant is called ''transpiration''. It occurs mainl through the stomata. However, as quickly as water is lost from the leaves, more water enters the roots and flows up the stem. The water flows up the plant in narrow pipes, rather like capillary tubes. These tubes make up the xylem. The walls of the tubes are made of lignin, which is hard and waterproof. In trees and shurbs the xylem tubes are one of the main components of wood. They do not contain living material and are therefore dead.` Water rises up the stem mainly by being ''pulled'' from above. The ''pull'' is created by the evaporation if water from the leaves. If you stop this by, for example, cutting iff the leaves or blocking the stomata, the flow of water up the stem slows down or stops. The drier the atmosphere, the greater is the rate of transpiration. In very dry wather, water may evaporate from the leaves faster than it is replaced from the soil. The plant then suffers from water shortage. Normally a plant's cells are full of water, and all the cells are pressing against each other within the epidermial covering. This helps to support the plant amd holds the leaves out flat. If a plant runs short of water, the cells lose water and go flabby. The plant then droops. This is called wilting. Plants living in dry places have all sorts of adaptations for not

THE CORRECT ANSWER IS A) CAPILLARY ACTION

Which energy conversion takes place in plant cells, but never in animal cells? a.chemical energy to the energy of motion
b.light energy to chemical energy
c.chemical energy to light energy
d.the energy of motion to sound energy

Answers

b is the correct answer

Final answer:

Correct Option Is b. light energy to chemical energy.

The energy conversion of light energy to chemical energy, known as photosynthesis, occurs in plant cells but not in animal cells.

Explanation:

The energy conversion that takes place in plant cells but never in animal cells is the conversion of light energy to chemical energy. This critical process is called photosynthesis.

During photosynthesis, plants absorb light energy, usually from the sun, and transform it into chemical energy stored in the form of glucose or other sugars. This chemical energy is then used by the plant for growth and development.

On the other hand, animal cells do not have the capability to carry out photosynthesis because they lack the necessary organelle, chloroplasts, and pigments required for absorbing light energy.

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If element X has 15 protons, how many electrons does it have?

Answers

If element X has 15 protons, it would also have 15 electrons.

If the element has 55 protons it is celcium and it also has 55 electrons. It has an atomic mass of 133 (132.9) so to get the number of neutrons you subtract the atomic mass and the number of protons.

Complete the analogy below. Rainfall is to precipitation as groundwater is to _____.a. humidity
b. infiltration
c. evaporation
d. condensation

Answers

The correct answer is (b.) infiltration. Rainfall is to precipitation as groundwater is to infiltration. Precipitation is the release of the water from the cloud (evaporated water) in the form of rain and snow. Infiltration is a process in which the water from the ground enters the soil.

Answer:

The answer is B. infiltration Hopefully this helps!

Organisms that are composed of many cells working together to form tissues, organs, and organ systems are referred to as _________. complex unicellular bicellular multicellular