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bazaltina [42]
3 years ago
5

The observer-expectancy effect describes how

Biology
1 answer:
Artyom0805 [142]3 years ago
7 0
D. I just took the test on USA Test prep so ya, remember to mark this the brainlyest answer
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Throw some loght on dichloroindophenol chemical and its function in photosynthesis
madam [21]

Answer:

Dichloroindophenol chemical act as electron acceptor in photosynthesis

Explanation:

DCPIP (2,6-dichlorophenol-indophenol) in general is a dye of blue color which reduces to become colorless and hence act as an electron acceptor in the light reactions of photosynthesis

It is used to measure the rate of photosynthesis, because its reduction leads to identification of reducing agent (Diphenylcarbazide) in plant  that is produced at the time of photosynthesis with in the chloroplasts.

8 0
3 years ago
How does the polymerase chain reaction make DNA fingerprinting more reliable?
Triss [41]
The polymerase chain reaction makes DNA fingerprinting more reliable because it allows scientists to quickly make many copies of DNA the answer is C
5 0
3 years ago
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Abe knew from his anatomy class that there are three different kinds of muscle tissue in the body. He knew lifting weights would
Aleksandr [31]

Answer:

Three different kinds of muscles are -:

  1. <u>SKELETAL MUSCELES </u>
  2. <u>CARDIAC MUSCLES </u>
  3. <u>SMOOTH MUSCLES</u>

Explanation:

  1. <u>SKELETAL MUSCLES -: </u>There are long, cylindrical, and striated skeletal muscle cells. They are multi-nucleated, which means they have more than one nucleus. This is because from the fusion of embryonic myoblasts, they are created. Each nucleus controls the sarcoplasm's metabolic demands around it. There are high energy requirements for skeletal muscle cells, because they contain several mitochondria in order to generate adequate ATP. <u>Examples of skeletal muscles: arms and legs- </u>T<u>he muscles that belong to the arms and legs feature in pairs. Abdomen and Back- These muscles are connected to the various sets of skeletal muscles that run across the torso.</u>
  2. <u>CARDIAC MUSCLES -</u>: Cardiomyocytes have a short and narrow outline and are fairly rectangular. They are about 0.02 mm wide and 0.1 mm (millimetres) long, respectively. There are many sarcosomes in cardiomyocytes, which provide the required energy for contraction. Cardiomyocytes usually contain a single nucleus, unlike skeletal muscle cells. Cardiomyocytes, although they contain more sarcosomes, normally contain the same cell organelles as skeletal muscle cells.<u> example - cardiac muscle is present in heart. </u>
  3. <u>SMOOTH MUSCLES -:</u> Smooth muscle cells have a single central nucleus and are spindle-shaped. They range in length from 10 to 600 μm (micrometers), and are the tiniest type of muscle cell. In the expansion of organs like the kidneys , lungs, and vagina, they are elastic and therefore essential. As in cardiac and skeletal muscle, the myofibrils of smooth muscle cells are not aligned, meaning they are not striated, hence the term smooth. <u>example of smooth muscles -: Walls of blood vessels ,  Walls of stomach , Ureters ,  Intestines ,  In the aorta (tunica media layer),  Iris of the eye. ,Prostate  and  Gastrointestinal Tract.</u>
5 0
3 years ago
Which of the following embryonic materials is matched with a correct post-natal (after birth) derivative? (Chose the most correc
Vlad [161]

Answer: Option B.

Neural crest and peripheral nervous system.

Explanation:

Neural crest are bilateral paired cells of the neural tube that arise from the ectoderm layer of the embryo. Thesescells move to different part of the body and differentiate into various cell types like melanocytes,cartilage and bone, smooth muscle, craniofacial, neurons, gangalia e.t.c. The neural crest running through neural tube develop into peripheral nervous system after birth. Peripheral nervous system consist of neurons and gangalia outside the nervous system The peripheral nervous system connect the central nervous system to organs, skin and limbs.

8 0
3 years ago
What factors differentiate Earth's atmospheric layers?
KengaRu [80]

Answer:

What factors differentiate Earth's atmospheric layers?

A. Pressure and Rate of condensation

B. Radiation deflection and Rate of condensation

C. Temperature and Pressure

<h2>D. Temperature and Radiation deflection</h2>

4 0
2 years ago
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