Answer:
The characteristics to the correct phylum matching is given below:
Explanation:
- Organisms lack symmetry- Porifera. Poriferans such as sponges are without any symmetry, thus they are asymmetrical.
- Organisms have specialized stinging cells -Cnidaria. Cnidaria such as <em>Hydra</em> possesses stinging cells or cnidocytes located around the mouth and tentacles of the <em>Hydra</em> and can kill prey with toxins.
- Adult forms are sessile – Porifera. Adult sponges are sessile and spend their lives attached to a substrate.
- Two types of body plan exist as polyp and medusa – Cnidaria. Cnidarians show two distinct body plans as polyp or stalk and medusa or bell. Polyps are non-motile and Medusa are motile.
- Organisms obtain food by filtering water– Porifera. The water moves through the body of the poriferans to filter out food, absorb dissolved oxygen.
- Phenomenon of alternation of generation is observed - Cnidaria. Alternation of generation is a type of life cycle which switches between two forms. In cnidarian, the asexual polyp alters with the sexual medusa.
Answer:latent (i did not consider anything)
Answer:
The correct answer will be option-A
Explanation:
Emotional memory refers to the memories of experiences which evokes or triggers the emotional reaction in higher organisms.
Emotional memory after evoking the emotional reactions remembers the past experiences based on which the person feels if the present event is pleasant or unpleasant.
The pounding of the heart is caused by the shock or the stress conditions observed with the fast beating of the heart. In the given question, When the heart pounds after seeing the rattlesnake will be considered response caused by the emotional memory as the rattlesnake is dangerous to humans based on the past experiences which evoke the emotional response.
Thus, option-A is the correct answer.
Answer:
If blue flower colour is dominant to white then there will be two conditions for the dominant plant. It will either have homozygous dominant (BB) alleles or it will have heterozygous alleles (Bb). The phenotype will be blue flower colour.
As the white flower is recessive,it will have the alleles bb. The phenotype will be white flower colour.
If all the offsprings produced by the cross are blue, then it means that the dominant blue plant was homozygous for the trait. All the offsprings produced will have blue colour and a heterozygous genotype.
Answer:
C. Properties that can change the chemical nature of matter.
Explanation:
Chemical properties is a characteristic of a chemical substance observed when it undergoes a chemical reaction on seeing its precipitation. On knowing the chemical properties of a substance it aids in separation, purification and classification of a compound. some examples of chemical properties are as follows:
1. Toxicity
2. Inflammability
3. Reaction with other chemicals
4. Oxidation
