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elena-s [515]
2 years ago
10

The fundamental excitable cell in the nervous system is the _____. see concept 49.1 (page 1084)

Biology
1 answer:
Illusion [34]2 years ago
8 0

Neuron 

Neuron can be defined as excitable cell that usually carries, processes and transmit impulses or electrical signals. Thus, they are known to be basic unit of the nervous system which includes the spinal cord and brain. However, the signals between s neurons occur via certain connections called synapses.

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Why do scientists classify organisms
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Scientists classify living things to organize and make sense of the incredible diversity of life. Classification also helps us understand how living things are related to each other.
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In the amoeba, water input and output are controlled by the _____. nucleus food vacuole vacuole pseudopodia
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The correct answer is vacuole. Vacuole controls the water input and water output of an amoeba. It is found within endoplasm. The vacuole is an essential part of an amoeba because it maintains the life of an amoeba. Malfunction can cause the amoeba to burst.
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3 years ago
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The branch of biology that explains both the diversity and the unity of life is ________. microbiology taxonomy evolution geneti
iVinArrow [24]

Answer:

Evolution

Explanation:

Evolution is the change in habits, hereditary and physical characteristics of a species over various generations in response to environmental conditions. Evolution lead to adaptation, the nature selection of the fittest and elimination of remaining.

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7 0
3 years ago
A scientist argues that two species of birds are the same species because they have similar body structure, similar DNA, and sim
sveticcg [70]

Answer:  

Birds have a different mating season this evidence will go against the argument and suggest that the birds are actually different species. Generally, two factors seasonal and behavioral identifies the differences among the species. Species generally interbred among the same population of species according to the season and hence they loose mating opportunities.  Although being sexually compatible they do not interbreed. Behaviorally, a biological clock in species naturally sets breeding cycle according to the resources availability, suitable nesting sites and mating opportunities. Different species have different seasonal requirements to accomplish this.

8 0
2 years ago
A forest contains both spruce trees and pine trees. Young spruce trees need shade in order to mature. Young pine trees need full
Montano1993 [528]

Answer: A. Spruce trees reduce the sunlight available to young pine trees, thus decreasing the environment's carrying capacity for pine trees.  

Explanation:

Carrying capacity is the maximum number of the members of the population of a species which an ecosystem can sustain in terms of availing the resources. The population size will be affected when the carrying capacity does not meet the demand of the population.  

In the given situation, the pine trees requires the sunlight to mature whereas the spruce trees requires the shade to get mature. If the spruce trees are taller than the pine trees they are likely to reduce the available sunlight of the young pine trees. Hence, the environmental carrying capacity for pine trees will decrease in the absence of proper sunlight.

8 0
3 years ago
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