This is released by cells during cellular respiration

The physical basis of memory is a pathway through the brain called a memory trace, in which new synapses have formed or existing

vekshin1

Answer:

True

Explanation:

Memory is formed by creating new neural pathways from stimuli we receive (smell, vision, auditory etc) to the brain where the pereception of it occurs.

Memory is defined as ability of the brain to encode, store, and retrieve information when needed. Memory forming is actually information processing that includes:

• sensory processor - sensing the information from the outside world ( chemical and physical stimuli)

• Working memory (short-term memory) - encoding (stimuli information) and retrieval processor (from previously stored material)

• Long-term memory - to store data through systems.

4 0

3 years ago

Lipid makes up the __________ in humans. Select one: a. hair b. bones c. ear wax d. outer layer of skin

Cerrena [4.2K]

The answer to your question is the outer layer of skin

hope this helps

6 0

4 years ago

A population of wild-flowers was scored for flower color. There were 302 blue (BB) plants, 1857 violet (BR) plants and 811 red (

Lina20 [59]

Answer:

Explanation:

Hardy and Weinberg described all the possible genotypes for a gene with two alleles. The binomial expansion representing this is, p2 + 2pq + q2 = 1.0

Where,

p2 = proportion of homozygous dominant individuals (BB) = 313

q2 = proportion of homozygous recessive individuals (RR) = 857

2pq = proportion of heterozygotes (BR) = 1820

The proportion of BB individuals in the population is = 313/2990 = 0.1046

The proportion of BR individuals in the population is = 1820/2990 = 0.6086

The proportion of RR individuals in the population is = 2/82 = 0.2866

I).

a). The frequency of p allele in the population is, (B) = p2 + 1/2(2pq) = 0.1046 + ½ (0.6086) = 0.4089

b). The frequency of q allele in the population is, (R) = q2 + 1/2(2pq) = 0.2866 + ½ (0.6086) = 0.5909.

II).

The expected number of individuals with the BB genotype = 0.4089* 0.4089 = 0.1671*2990 = 499.6 = 500

The expected number of individuals with the BR genotype = 2*0.4089* 0.5909 = 0.4832*2990 = 1444.768 = 1445

The expected number of individuals with the RR genotype = 0.5909*0.5909 = 0.3491*2990 = 1043.809 = 1044

CHI - SQUARE (X2):

X2 = Σ(O - E)2 / E

Where O = Observed frequency

E = Expected frequency

Phenotype O E (O-E) (O-E)^2 (O-E)^2/E

BB 313 500 -187 34969 69.938

BR 1820 1445 375 140625 97.31834

RR 857 1044 1.5 2.25 0.155172

2990 2989 189.5 167.4115

The calculated Chi-square value is = 167.4115

Degrees of freedom is = n-1 = 3-1 = 2

The P-value is < 0.00001, which is significant at p < 0.05. So, we reject the null hypothesis.

Conclusion: There is a significant difference between the observed and expected values.

5 0

3 years ago

Which of the following pairs of animal phyla are the most closely related?

jok3333 [9.3K]

C. Cnidarians and echinoderms is the answer.

There are 3 phyla that sorts worms platyhelminthes (flatworms), nematodes (round worms) and annelids (segmented worms). The closest one is C.

hope I Helped!

4 0

3 years ago

Phylogeny can be based on morphological homologies and molecular homologies. What are the advantages and limitations to using ea

Arturiano [62]

Answer:

1. Molecular data:

- Advantages:

a. less susceptible to evolutionary convergence

b. huge amount of potential characters available for data comparison (each nucleotide can potentially be used to assess the state of a character)

c. useful for assessing times of divergence

- Disadvantages:

a. multiple sequence alignments are hard to solve for sequences with high evolutionary rates

b. limitation to the number of states of the character

c. generally unuseful for comparing with data from extinct species

d. difficulties of inferring positional homology

2. Morphological data:

- Advantages:

a. useful to understand the evolutionary significance of traits in extinct ancestral species

b. there is not limitation to the number of different states of the character

- Disadvantages:

a. susceptible to evolutionary convergence

b. limited number of characters is available

Explanation:

Morphological and molecular data are the two primary sources of information used to infer homology. In the last years, molecular data gained ground for this purpose. However, it should be stressed that molecular data only have 4 different states (i.e., 4 different types of nucleotides), while for morphological data in principle there is not limitation to the number of different states. On the other hand, morphological traits are more susceptible to evolutionary convergence, thereby leading to spurious results when assessing the homology of problematic characters. Finally, it is important to highlight that morphological data are generally more useful to understand the origin and homology of traits in extinct species.

5 0

3 years ago

This is released by cells during cellularrespiration​

This is released by cells during cellularrespiration