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jenyasd209 [6]
4 years ago
6

Natural selection always acts on?

Biology
1 answer:
cupoosta [38]4 years ago
7 0
Natural selection acts on a population. NOT THE INDIVIDUAL.
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​chemical secretions from ____ attack some worm parasites in the body.
tamaranim1 [39]
The correct answer is thrombocytes.

Thrombocytes sometimes called blood platelets are an important compound of the blood. Their main role is to repair damage and prevent excessive damage when an injury occurs. Thee platelets do this by forming blood clots at the site of the injury. Recent studies have shown that these structures also have a role in the defense against parasites.
6 0
3 years ago
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You have lost the sensation, but not movement, in one of your hands due to a problem with your spinal cord neurons. Based upon t
Usimov [2.4K]

Answer:

A sensory neuron.

Explanation:

The nervous system can be divided in two systems: the central nervous system and the peripheral nervous system. The central nervous system (CNS) is composed by the brain and the spinal cord. The peripheral nervous system (PNS) consists of the nerves and ganglia. Neurons are specialized cells that form the basic functional unit of the nervous system. There are three types of neurons: sensory, motor and interneurons. The sensory neurons are in charge of bringing signals into the CNS, and the motor neurons are in charge of carrying signals out of the CNS. The interneurons act as intermediaries, passing information between two neurons.  

As the name implies, sensory neurons are activated by the senses, for example: sound, visible light, physical contact (heat and cold), chemical signals (smell and taste). The loss of sensation in one hand would be the result of a damaged sensory neuron.  

7 0
3 years ago
What are all the reasons why ketone bodies are produced in the body?
aliya0001 [1]

Answer:

When Glucose is in short supply.

Explanation:

Ketone bodies are produced in mitochondria of liver cells to augment the shortage of glucose in the body. Shortage of blood sugar glucose can occur due to fasting, rigorous exercises or medical conditions.

7 0
4 years ago
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Explain how and why different parts of a plant are sinks for the translocation of sucrose at different times of the year in a co
rusak2 [61]

Answer:

The sucrose is transported around the plant in phloem vessels. It needs to be able to reach all cells in the plant so that the sucrose can be converted back into glucose for respiration. The movement of sucrose and other substances like amino acids around a plant is called translocation .

Belowground organs of plants (e.g. roots and rhizomes) are sinks during plant growth since they cannot perform photosynthesis. Some organs are both a source and sink. Leaves are sinks when growing and sources when photosynthesizing

8 0
3 years ago
Which statements accurately describe the role of water on Earth? Select three options.
riadik2000 [5.3K]

Answer:

B,C,D

Explanation:

Water reflects light , retain heat and also in weathering

6 0
4 years ago
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