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mina [271]
3 years ago
15

Which experiment should be conducted as a field investigation?

Biology
1 answer:
liubo4ka [24]3 years ago
7 0
Observing changes in the nesting behavior of wood ducks
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Which of the following is an excitatory neurotransmitter secreted by motor neurons innervating skeletal muscle?
MA_775_DIABLO [31]

Answer:

C) acetylcholine

Explanation:

Acetylcholine is an excitatory neurotransmitter secreted by motor neurons innervating skeletal muscle.

However, norepinephrine, gamma aminobutyric acid, and cholinesterase are not excitatory neurotransmitter secreted by motor neurons innervating skeletal muscle.

6 0
3 years ago
The bohr effect refers to the unloading of ________ in a rbc due to declining blood ph.
grigory [225]
The answer is D the answer is D
8 0
3 years ago
Chondroblasts ________. Chondroblasts ________. are mature cartilage cells located in spaces called lacunae never lose their abi
Mariulka [41]

Answer:

within the cartilage divide and secrete new matrix

Explanation:

Chondroblasts also called as perichondrial cells form chondrocytes which are the cells of cartilage. They also secrete the cartilage matrix which forms the cartilage. This matrix consists of collagen, fibers, proteoglycans, hyaluronic acid, water and glycoproteins.

They divide within the formed cartilage too to secrete new matrix. They are called chondrocytes when they become a part of cartilage matrix. Here they grow the cartilage matrix by secreting more extracellular matrix rather than dividing. Once the cartilage formation is completed it is composed 10-20% of collagen fibers, 65-80% of water and rest is made by proteoglycan-hyaluronic acid aggregates.

6 0
4 years ago
A mushroom gains its energy by decomposing the tissues of dead organisms. Should mushrooms be classified as autotrophs, heterotr
stealth61 [152]

Answer:

They are heterotrophs because their food is made by other organisms.

Explanation:

Unless the organism can create their food independently via photosynthesis or chemosynthesis, they must get their food from elswehere.

In the case of mushrooms, they are scavengers/decomposers, meaning they consume energy from once living organisms, thus classifying them as heterotrophs.

Have a nice day!

4 0
3 years ago
Which of the following is conical movement in which the distal end of a structure moves in a circle and the proximal end remains
mars1129 [50]

Answer:

The correct answer is OPTION C (Circumduction)

Explanation:

Circumduction is motions without clear opposites of the part of the body, an example is rotating the hand from the wrist. The answer is circumduction because this type of movement ensures the distal end of a bone moves in a circle while the proximal end remains relatively stable is particularly found in bones where the movements of the joints are opposite to each other example is the ball and socket joint movement. For circumduction to take place, the degree of distance between two bones of the body has to be decreased and sometimes straightened to increase the level of movement or motion produced, there must be a movement towards the middle of the body and sometimes joint movement away from the middle of the body. All these movements are in order.

4 0
3 years ago
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