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sladkih [1.3K]
2 years ago
13

To test how fertilizer affects aquatic animals, a student prepared four identical containers with water fleas. The student then

added different amounts of fertilizer mixed with distilled water to three of the containers and distilled water alone to one of the containers. What is the experimental group in this experiment?
A. All the water fleas in the container with the most fertilizer
B. The water fleas in the container with only distilled water
C. All the water fleas in all the containers
D. The water fleas in all the containers receiving fertilizer
Biology
2 answers:
artcher [175]2 years ago
7 0
The best answer is D..

It will help u
Naya [18.7K]2 years ago
4 0

D. The water fleas in all the containers receiving fertilizer


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Damage to sensory receptor cells would most likely result in ________. I. confusion of visual and auditory input II. inaccurate
MatroZZZ [7]

Answer:

The correct answer is: None of the above. The accurate answer is: Problem or inability in detecting the sensory information.

Explanation:

  • Sensory receptor cells form the part of the sensory epithelial layer that are present in the form of a lining in all sensory organs.
  • These sensory cells possess some specialised receptor molecules, usually on the surface of the cells, that can sense different types of sensory signals like light, in case of eyes, smell is case of nose, taste in case of tongue and sound in case of ears.
  • Any damage caused to these cells will adversely affect their capability to perceive or receive or detect the sensory signals.
  • Option I is incorrect because sensory cells are not only present in the eyes and ears but also in nose, tongue, skin. The activity of the sensory cells of one organ is independent of the activity of sensory cells of other organs hence, damage to the sensory cells of one organ will not create any confusion in different sensory inputs.
  • Option II is incorrect because integration of all the sensory impulses occur in the brain after the impulse has been received and detected by multiple sensory receptor cells and send to the brain through the sensory neurons.
8 0
3 years ago
Populations evolve for many reasons. Suppose there is a population of plants that have either purple flowers or white flowers, a
sattari [20]

Answer: natural selection

Explanation:Natural selection, gene flow, gene drift and mutation are the mechanisms for EVOLUTION.

The dominant purple allele must have been acquired from previous parent gene, by natural selection

Definitely the available   alleles from previous flower population were white and purple flowers. But, because the parents of purple flowers exhibit VARIATION, in their gene pool,  they showed dominance over  the recessive white colour flowers in the same population.  

◼ from Darwin’s observation and deduction, Organisms who acquired certain characteristics from variation  tend to survive than others, and therefore pass these inheritable characteristics to their offspring.

◼Thus the purple flowers dominated the population for the available resources, among the other flowers colours, (competitions) therefore it leads to a stable population in size after a period of time., while the white colour flowers are recessive

◼Darwin concluded that, variants of best adaptation will be selected for by natural conditions operating in the environment of the population at that particular period (natural selection).

Based on this, natural selection takes place, and the purple flowers with best variation will have selective advantage (dominance)above white colour flowers(recessive).

Consequently, they have higher survival rates compare to white flowers in the population this is   survival of the fittest by natural selection of purple flowers

The frequency of the white colour flower will reduced because of less manifestation of traits from generation to generation from reduced gene pool due to recessive trait, however the frequency of Purple flower will increase because the number of copies of allele of purple flowers is greater than the total number of all the flowers population( white flowers+purple)

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3 years ago
Changes in the genetic make-up are normally ______
andrezito [222]
It is Harmful because if the organism is used to their environment and something changes your body is not going to function right
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3 years ago
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1.) Neurons, they transmit nerve impulses<span>.
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Please help me please
Ivenika [448]

Answer:

D

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it has to be D because its talking about "how does a volcanic ash affect water systems"

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