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olya-2409 [2.1K]
3 years ago
5

The most primitive true animal belongs to the phylum ____.

Biology
1 answer:
VMariaS [17]3 years ago
6 0

Answer:

Porifera or Sponges

Explanation:

Porifera is the phylum of the simplest multicellular marine animals. Their body is composed of  two cell layers (something like tissues) and mesophyl between them. The body is in direct contact with surrounding water through the large number of pores and channels. What makes Sponges so simple is that their cells are unspecialized and that they  don't have nervous, digestive or circulatory systems.

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What is the hardy weinberg symbol for the dominant allele
soldier1979 [14.2K]

Answer:

The Hardy Weinberg symbol for the dominant allele is 'p' in his equilibrium equation.

Explanation:

  • The equation given by Hardy: "\bold{p^{2}+2 p q+q^{2}=1}" is known as "Hardy-Weinberg equilibrium equation".
  • The frequency of dominant allele and recessive allele for a trait is represented by 'p' and 'q' respectively.
  • 2pq in the equation is the frequency for heterozygous  genotype.
  • Conditions that must be considered for the Hardy-Weinberg equilibrium equation to satisfy are: no mutations , no flow of gene, large population size, no selective forces , no non-random mating.
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True as far as I know. 
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4 0
3 years ago
Arya observes that the grass behind her house is dry. She believes the water content in the soil is about two-thirds lower than
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LaKeisha stepped on a piece of glass and quickly pulled her foot away from that sharp object. Which of the following are respons
nikdorinn [45]

Answer:

Motor nerves

Explanation:

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As soon as she steps on the glass piece, the receptors present in the skin of her foot sole sense it and send the information to the control center via sensory neurons. The spinal cord commands the muscles of the effector organ (leg) via motor neurons to move to step away from the glass piece.

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3 years ago
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