discuss the characteristics of phylum mollusca​

Answers

Answer 1

Answer:

The body is soft and unsegmented. Body is divisible into three regions – head, a visceral mass, and ventral foot. Body is covered by a mantle and shell. They can be found in different habitats, both aquatic and terrestrial.


Related Questions

Which word describes the process by which a human transmits a disease to an animal?

Answers

Answer: reverse zoonosis or anthroponosis.

Explanation:

Answer:

a zoonosis

Explanation:

is an infectious disease caused by a pathogen (an infectious agent, such as a bacterium, virus, parasite or prion) that has jumped from an animal (usually a vertebrate) to a human. Typically, the first infected human transmits the infectious agent to at least one other human, who, in turn, infects others

What happens when you change the material through which a wave travels?

Answers

Answer:

Changing the material will speed up or slow down the wave depending on the index of refraction of the material.

JND stands for:
Select one:
a. Just noticeable theory
ob. Just noticeable direction
c. Just negotiable difference
d. Just noticeable difference​

Answers

The correct answer is D. Just noticeable difference.

Explanation

In psychophysics, a barely noticeable difference, usually abbreviated with lowercase letters JND, is the smallest detectable difference between an initial and a secondary level of a particular sensory stimulus. Also known as limen difference, differential threshold, or less noticeable difference. According to the above, the correct answer is D. Just noticeable difference.

how is spark formed, and why might a spark start an explosion?

Answers

Answer:When the applied electric field exceeds the dielectric breakdown strength of the intervening medium, a spark is generated. In a mechanism known as dielectric breakdown, the exponentially increasing electrons and ions allow regions of the air in the gap to become electrically conductive.

An electrostatic spark causes the blast. The sudden rise in temperature that occurs as the mixture ignites causes a massive increase in gas pressure. The ensuing increase in pressure could collapse the chamber with a noisy explosion if the burning vapour were to be trapped.

Explanation:

Some people's earlobes dangle or flap unattached, while others don't. This trait is genetically determined. Use the genetics simulation to explore the genes that determine whether earlobes are attached or unattached. One trait is dominant and the other is recessive. See what happens when you cross parents with different genetic combinations. Follow the specific instructions for each trial.

Answers

Complete question, Answer, and Explanation:

Due to technical problems, you will find the complete question, answer, and explanation in the attached files

PLEASE HELP!!!!!!!!!!​

Answers

Answer:

3 (dominant) 1 (recessive)

Explanation:

How will the temperature inside the car feel?
Hint: Akbar wonders if what happens in his car is similar to the greenhouse
effect.
Predict the temperature of the air inside the car.
Colder than the outside air.
Warmer than the outside air.
Exactly the same as the outside air.

Answers

Answer:

Predict the temperature of air inside car because we can use cooler to cool and if we close all windows it will be hot inside.

The function of some cyclin-dependent protein kinases (CDKs) has been remarkably conserved in evolution. Indeed, coding sequence for the human protein Cdc2 is able to substitute for the CDC28 gene in S. cerevisae and allow the yeast cell to grow and mate essentially normally. The following sequence near the NH2-end of the molecule is identical in both proteins: Gly-Glu-Gly-Thr-Tyr-Gly-Val-Val-Tyr-Lys-Ala. Does this mean that nucleotide sequences of the two genes coding for this region of the polypeptide are also identical

Answers

Answer:

No, because the genetic code is redundant  

Explanation:

During the translation, a single amino acid may be coded for by more than one codon. It is for that reason that the genetic code is considered to be redundant. Tryptophan is the unique amino acid specified by a single codon. In this case, it is likely that silent mutations at the nucleotide sequence that encode for the Glu-Gly-Thr-Tyr-Gly-Val-Val-Tyr-Lys-Ala protein motif might have accumulated during the evolution of both CDK genes, modifying thus their nucleotide sequences while preserving the same protein sequence.

How does a food chain differ from a food web?
A. A food chain identifies the consumers and producers, while a food web lists all of the animals in an ecosystem
B. A food web shows what to eat, while a food chain shows how the eating patterns are connected.
C. A food chain shows an eating pattern, while a food web shows how the various eating patterns are connected.
D. a food chain shows how eating patterns are connected among organisms, while a food web shows the eating patterns among organisms

Answers

It’s C
Food chains are pretty simple while a food web is very complex

Answer:

C

Explanation:

A food chain shows an eating pattern, while a food web shows how the various eating patterns are connected.

living in an unhealthy community will lead to. ​

Answers

Explanation:

if you mean dirty or not cleaned in a while then you can get sick from the lingering germs, and you can get sick or die if something like a gas pipe has rusted open from not being cleaned. there are many other examples.

Living in an unhealthy community will lead to sicknesses and diseases, and it would spread way easier too, if there are no healthcare professionals around the area.

I will mark brainlyest

A group is a collection of same kind of organisms that travel together, live, and perform daily tasks together.
Scientists claim that group behavior can increase the chances for an individual and a species to survive and reproduce.
What are the pro's of group behavior? Choose ALL that could apply.
A)
Reduced chance of predation.
B)
Better chance at finding a mate.
Improved foraging, locating food sources.
D)
Increased competition for food or a mate.
E)
No struggle for authority; shared leadership roles.

Answers

Answer:

a b e

Explanation:

these are all pros of living in groups

What will lead to changes in a phenotype of an individual?
a. medicines
b. nutrition frequency
c. DNA sequence variation
d. all of the above

Answers

Answer: D

Explanation:

May someone help me with this please?

Answers

photosynthesis: CO2

i think so :)

One species called the naked mole-rat, has some unique differences. They have a social structure similar to that of ants and bees, they are smaller in size and are mostly ectothermic. They live in harsh, dry scrub land habitats and forage mainly on underground tubers which are widely dispersed. Why you think this species evolved back to an ectothermic life style rather than staying endothermic like all other mammals

Answers

Answer:

May be of the environment they live or genetics.

Explanation:

This naked mole rat species evolved back to an ectothermic life style rather than staying endothermic like all other mammals because of the environment they live or change in the genetic makeup. The main reason for this evolution may be the environmental they lives or through the change in genetic makeup of this naked mole rat species so both factors can contribute in the evolution.

Select the neurological problems that affect women more often than men.

Answers

Answer: Imma say the Parkinson's disease.

This disabling neurological disease affects about 50% more men than women.More than two times more men than women are affected by antisocial personality disorder and substance use disorder. Several cancers, including stomach cancer (2:1), oesophageal cancer (3:1), liver cancer (2:1 to 4:1) and oral cancer (2:1 to 3:1), which have mostly lifestyle-based risk factors, are more common in men.

Hope this helps have a awesome day/night❤️✨

Explanation:

Fibromyalgia is neurological disorder that involves the brain's communication with the body's pain receptors, via the spinal cord. Fibromyalgia affect women more than men.

Help plzzz I’ll give Top Brainiest

Answers

Answer:

A

Explanation:

Just think about it, you have to heat the tomatoes on the stove to be a sauce, the heat makes it soft.

What is the optimal pH that this enzyme functions at? And What is the optimal temperature that this enzyme functions at?

Answers

Answer:

Optimum Temperature is 35°C

Optimum PH is 7.0.

Explanation:

The optimum temp of enzymes is 20-35°c. They become inactivated at very low temperature and denatured (destroyed) at very high temp i.e. greater than 45°C. Low molecular weight enzymes are comparatively more heat stable.

The optimum pH of most enzymes is pH 7.0 (neutral pH).

Which cell structure serves the stated function in both eukaryotic and prokaryotic cells?
nucleus: stores genetic material
O cytoplasm: protects cell structures
O ribosomes: regulate cell processes
O DNA: surrounds cell contents

Answers

Answer: O cytoplasm: protects cell structures

Explanation:

where do we not find glycosidic bonds?
a. lipids
b. cellulose
c. lactose
d. starch

Answers

Answer:

C

Explanation: In a fat molecule, the fatty acids are attached to each of the three carbons of the glycerol molecule with an ester bond through the oxygen atom. During the ester bond formation, three molecules are released.

red-green color blindness is an x-linked recessive disorder. if the mother is RGCB and the father has normal vision, what are the changes for daughters and sons to hae the trait

Answers

Answer:

The correct answer would be -

RGCB daughter - 0%

RGCB sons - 100%

Explanation:

Red-green color blindness is a sex-linked recessive disease that means it will only express in absence of the normal allele that is present on X-chromosomes. As it is known that males have only one X-chromosomes therefore, the chances are more in males to be affected in presence of the recessive gene. In this given case women s RGCB and man has normal vision. The genotype of women would be both recessive alleles XcXc and genotype of man would be XY.

The gametes would be - Xc, Xc and X, Y

then the cross:

       Xc     Xc

X     XXc    XXc

Y    XcY      XcY

so the offspring would be -

Carrier female =  XXc (50% chance in total and 100% in daughters)

RGCB daughters = 0%

RGCB male =  XcY (100% in sons and 50% of total children)

HELP ILL GIVE BRAINLIEST!! A scientist discovered a new species living in the deep ocean. This organism is prokaryotic, unicellular, has a cell wall, and is a heterotroph. What kingdom does this organism belong to?

Answers

Answer:

Kingdom Eubacteria

what name do we use for the outer membrane of skeletal muscle cells?
a. sarcoplasmic
b.sarcoplasm
c.sarcolemma
d.sarcasm​

Answers

Answer:

The answer is sarcolemma

the answer is c sarcolemma

this type of consistent adaptation between two species is known as

Answers

Answer:

Symbiosis or Mutualism: When two species live together in a close association that is helpful to both species, the relationship is known as symbiosis. The oxpecker bird and the rhinoceros exhibit this relationship. The oxpecker receives protection and obtains food from the ticks and other pests infesting the rhino’s skin.

Explanation:


1. According to Keller Larry it is the process by which governance is done.
A.politic
B. Governance
C. Government
D.alloftheabove

2. Politics refers to the study of state and government in the other hand, political science describes the
processes by which people and institutions exercise and exist.
A.Both statements are TRUE
C Only the first statement is TRUE
B. Only the first statement is FALSE
C.only the first statement is true
D. Both statementare FALSE

3. Defines as the execution of power, in whatever forms, policies, laws, decisions it chooses.
A.State
B. Government
C.politics
D.Givernance

4. It is the set-up that governs managing the country, the economy, the main social institutions -
A.Government
B. Governance
C.state
D.Politics

5. According to Keller Larry it is the process by which governance is done.
A Politics
B. Governance
C. Government
D.all of the above

6. Which of the following is a CORRECT understanding of ideology?
A.Attitudes
B. Values
C. Beliefs
D.all of the above

7. What can'we infer from the phrase, Men by nature is a political animal!
A. Everyone is subject to politics
C. Only politicians exercise Politics
B.Politics is portrayed by animals
D. C only

8. In general this means organizing human activities.
A. Politics
B. Government
C. Social
D. all of the above

9. Which of the following is an INCORRECT understanding of Politics?
A. It deals with theories
C. Understanding social groups
B. Making non government policies
D. A and B

10. Which of the following is associated with Political Science?
A. Political Theory
B. Public Law
C. Public Administration
D.all of the above

11. Which of the following facilitates change in Politics?
A.society
B.ideology
C.b only
D. a and b

12. Which of the following is the elements of politics
A.Power
B. Rule
C. Authority
D.all of the above

13. How do society regard politics as a desirable practices ?
A.Do the right thing
B. Being a law breaker
C. Being neutral
D all of the above

14. Which one is not an ill-effect of Politics?
A. Corruption
B. Discrimination
C. Equalities
D. Deviance

15. What is regarded as a means of organizing human activities
A.Government
B. Political science
C. Politics
D. All of the above

16.It is the right and obligation of qualified Filipino citizen to vote in the national and local election
A.Suffrage
B. Impeachment
C. Retirement
D. All of the above

17. Which of the following exercise legitimate power in government
A.Authority
B. Bureaucracy
C. Citizen
D. All of the above

18. Which of the following is the means by which the peope choose their official for definite and fixed
periods being as their representatives in the government.
A.Election
B Governing
C. Policies
D. All of the above

19. The power of the people to propose amendments to the constitution to propose and enact legislation
A.Succesion
B. Initiative
C. Impeachment
D. All of the above

_20. The study of politics is
also known as
A. Social Science
B. Natural Science
C. Political Science
D. All of the above

21.Its an ideology that have an idea of an organically unified national community and individual identi
must be entirely absorbed into the community or social group.
A. Liberalism
B. Fascism
C. Conservatism
D.All of the above

Answers

politics because politics is one of the major things

your slide is in focus but you cannot see anything, what maybe the possible problem​

Answers

Answer:

The correct answer would be - using a lens that is too high powered and thus you may be too focused on the specimen.

Explanation:

The possible scenario for this case where the slide is in focus but can not see anything could be either specimen is not under the lense or too focused on the specimen by using a very high-powered lens.

In a very high-powered lens, the lens becomes over-focused and the specimen does not look in the field of view of the lens, in such case, an individual should ower the power of lense.

Sympatric speciation occurs due to all of the following except O geographic isolation O pre-zygotic isolation O post-zygotic isolation O behavioral isolation​

Answers

Answer:

Explanation:

When two species are reproductively _____, gene flow does not occur between them ... Which of these are prezygotic isolating mechanisms? -behavioral -temporal ... All of the following statements concerning the evolutionary species concept are true ... both sympatric and allopatric speciation require a geographic barrier.

How many NAD+ become NADH during glycolysis, starting with one molecule of glucose?
a. none
b.1
c.2
d.6​

Answers

Answer:

d.6

Explanation:

Step 6 is the first step in which NAD+ is reduced to form NADH. Two NADH molecules are formed for every one glucose molecule.

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Pls someone help its a very easy question also don’t worry about the dot I accidentally did that

Answers

The 2 one is the right answer

In cats, the gene for Calico (multicolored) cats is an x-linked trait that is
CODOMINANT. Females that receive a "B" and an "R" gene have black and orange
splotches on white coats. Males can only be black or orange, but never calico.
A female calico's genotype is XBXR
Cross a female calico cat with a black male. (Complete a Punnett square)
What are the results of the cross?
25% Black and male, 0% Calico Male, 25% Calico female
50% Black and male, 50% Calico female.
50% Orange and male, 50% Female Black

Answers

Answer:

Considering the whole progeny (100%), there will be

25% Black male kittens, XBY0% Calico Male kittens25% Calico female kittens, XBXR

Explanation:

Available data:

The gene for Calico (multicolored) cats is an x-linked trait and codominantCalico Females receive a "B" and an "R" gene, and have black and orange splotches on white coats. Their genotype is XBXR.Males can only be black or orange, but never calico. Their genotype is XBY and XRY

Cross: a female calico cat with a black male

Parentals)   XBXR    x    XBY

Gametes)  XB  XR       XB   Y

Punnett square)    XB        XR

                   XB   XBXB   XBXR

                    Y      XBY      XRY  

F1) Among the whole progeny:

    2/4 = 50%  will be black (female XBXB and male XBY)     1/4  = 25% will be Calico (female XBXR)     1/4  = 25% will be Orange (male XRY)  

   Among females:

   1/2 = 50% of females will be black, XBXB    1/2 = 50% of females will be Calico, XBXR

   Among males:

   1/2 = 50% of males will be black, XBY    1/2 = 50% of males will be orange, XRY        

Can anyone solve this

Answers

A habitat, Is the physical area where an organism lives.
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