Biology, 12.02.2020 04:18 doglover1624
A young girl walking along the beach discovers a sea sponge washed up on the shore. She pokes it with her finger, and the animal contracts locally in response. Because the sea sponge reacted to her poke, the girl concludes that this animal has a brain. Is this conclusion correct?
A) Yes, if an animal responds to any type of touch or sensory signal, the animal must have a brain where such a signal is processed.
B) Yes, sea sponges are known to have brains; however, these structures are relatively simple compared to the brains of vertebrates.
C) No, sea sponges possess paired ganglia that process their responses to touch or environmental changes (much like flatworms).
D) No, sea sponges actually lack any type of nervous system—the reaction the girl observed is the result of a local population of touch-sensitive (non-neuronal) cells.
E) None of the answer options is correct.
Answers: 3
Biology, 22.06.2019 00:50, bvghchg8812
Select the situation bellow that would produce a total displacement of zero. a. a trip to the moon and then to mars b. a horse galloping from one end of a field to another c. the criss-crossing path of a bug as it flies from flower to flower d. a round-trip ride to school and back
Answers: 2
Biology, 22.06.2019 17:30, fordkenae
The diagram shows the results when two parents are crossed. the letters represent alleles for a trait that is controlled by three different genes. which best describes this inheritance pattern? multiple allele because a trait is controlled by three different genes polygenic because the offspring have alleles from both parents multiple allele because the offspring have alleles from both parents polygenic because a trait is controlled by three different genes
Answers: 1
Biology, 22.06.2019 20:50, kaleahearly123
Choose the best definition of allele. a. one of several possible versions of a gene, which each produce a different phenotype b. an organism that's purebred for a given trait c. the process of fertilizing a plant with pollen from another plant d. a set of genes that are located on the same chromosome and so are tightly linked
Answers: 1
A young girl walking along the beach discovers a sea sponge washed up on the shore. She pokes it wit...
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