What is the differences in reproduction between water and land snails?

Answers

Answer 1

Reproducing in water makes getting sperm to egg much easier for snails, whereas on land it is much more difficult to get sperm to egg.

What is the difference between the reproduction in land and a water snail?

The majority of gastropods (snails) have internal fertilization, but some prosobranch species that have external fertilization.

Freshwater snail species are separately sexed. Males fertilize the female through copulation, and females attach their eggs directly to firm, clean substrates such as a rocks, logs, or aquatic vegetation in shallow water.

Aquatic snails have two tentacles whereas land snails have four. Eyes are located at the tips in land snails and at the base in aquatic snails.

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Related Questions

Life on Earth has been influenced by what three large scale processes.

Answers

Evolution Natural Selection Heredity

Which statement correctly describes these broken pieces of the sample

Answers

Each piece contains the same number of atoms." The statement that correctly describes these broken pieces of the sample is that each piece contains the same number of atoms.


2. Full-sized wings are the typical phenotype for Drosophila. Which of the following events most likely led to the
existence of the short-wing allele in Drosophila?
A. a change in the shape of a chromosome
B. a change in the DNA sequence of a gene
C. the insertion of a DNA strand during mitosis
D. the deletion of a chromosome during meiosis

Answers

Answer:

B.  A change in the DNA sequence of a gene

Explanation:

An ion of aluminum has a charge of 3+. The ion contains 10 electrons. How many protons does a neutral atom of aluminum possess?

Answers

Answer:

13 protons

Explanation:

Aluminum, which has a symbol of Al, is an element in group 3 of the periodic table. It has a mass number of 27. Since the number of electrons and protons in a neutral atom are the same, a neutral/uncharged atom of aluminum contains 13 electrons, 13 protons and 14 neutrons. Note: Mass number = no. of protons + no. of electrons.

However, according to this question, an ion of aluminum has a charge of 3+, this means that an atom of aluminum has lost 3 electrons i.e. 13 electrons - 3 electrons = 10 electrons. Hence, aluminum atom with charge +3 will have 10 electrons. This doesn't change the fact that aluminum atom in a neutral state possesses 13 protons.

When the person from number one was creating "true breeding" lines of plants for certain traits, what method was used?

Answers

Complete question:

When the person from number one was creating true-breeding lines of plants for certain traits, what method was used?

A. Self pollination over and over again while discarding plants with unwanted traits

B. Cross-pollination over and over while discarding plans with unwanted traits

C. Allowing for cross-pollination by bees

D. Not allowing the plants to pollinate at all

Answer:

A. Self pollination over and over again while discarding plants with unwanted traits

Explanation:

Due to technical problems, you will find the complete explanation in the attached files.

What is the main body system affected from sickle cell anemia?

Answer choices:

Digestive System

Nervous system

Circulatory System

Respiratory system

Muscular System

Skeletal System

Answers

Answer:

Any and all major organs are affected by sickle cell disease. The liver, heart, kidneys, gallbladder, eyes, bones, and joints can suffer damage from the abnormal function of the sickle cells and their inability to flow through the small blood vessels correctly.

Explanation:

Answer:

The main body system affected by sickle cell anemia is the Circulatory system.

Explanation:

According to John Hopkins Medicine (a reliable source), "Any and all major organs are affected by sickle cell disease. The liver, heart, kidneys, gallbladder, eyes, bones, and joints can suffer damage from the abnormal function of the sickle cells and their inability to flow through the small blood vessels correctly."

What might happen to plants if they were unable to develop parts of the stem underground?

Answers

Answer:

The water travelling from the roots to the leaves will slow and eventually stop… ... If there are no buds, the plant my become deceased unless there is bulb or root mechanism that will resprout vegetative growth from below the ground to start a new plant…

Explanation:

Hope this helps

Which blome could an animal who hibernates in
the winter to survive the cold live in?

Answers

Answer:

Tundra

Explanation:A tundra is mostly Antarctica or the Arctic or mostly an area that's covered with loads of ice and snow.Arctic tundra is a very cold, windy, and treeless biome that's snow-covered for much of the year.

Is this an accurate description of the water cycle?

The water cycle is water in the sea or ocean that gets evaporated, that’s condensation. It turns into clouds but then just falls again as rain/snow, that’s precipitation. It goes to streams and runoffs. That is the water cycle.

Answers

Answer:

Yes,I think this is correct

Answer:

right, maybe that's the right answer

Explanation:

sorry if my answer is wrong

Which of the following is NOT an example of a primary consumer?
A. Maple trees
B. Caterpillars
C. Cows
D. Horses

Answers

Answer:

It would be A - Maple trees.

This is because Caterpillars, Cows, and Horses are all primary consumers as they all eat things. Also, primary consumers are herbivories, and carnivores are secondary consumers.

Explanation:

- Eijiro <3

The answer should be A

Can someone help me

Answers

Answer:

1...c

2... indicator

3... corrosive

hope my ans helps

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stay safe

have a good day

1. You have set up a cell-free transcription system in a test tube. By mixing DNA, RNA polymerase, sigma factors, ribonucleotides and other essential substances you are able to make mRNAs identical to those made under a variety of conditions in the cells from which these components were isolated. What would happen if you were able to remove the sigma factor first added to the tube and replace it with another sigma factor

Answers

Answer:

Different messenger RNAs (mRNAs) would have been produced

Explanation:

Sigma factors are protein subunits that form bacterial RNA polymerases and they are responsible to initiate RNA synthesis. The number of sigma factors is variable between different bacterial species. For example, Escherichia coli contains seven sigma factors, while Bacillus subtilis has at least 17 sigma factors, which control the transcription of different genes. These factors determine the specificity of the RNA polymerase to the target gene promoter regions and then control transcription initiation.

Why would you expect to find a great deal of
parenchyma tissue in the roots of plants such as the
carrot, beet, and radish?

Answers

Answer:

Parenchyma tissue makes and stores food. Because the roots of carrots, beets, and radishes store food for plant, one would expect to find large amounts of parenchyma tissue in these parts.


1, Which of the following is not an organelle within a cell ?
A, nucleus B,chloro plast C ,mitochondria D, Cytoplasm

Answers

Answer:

B.chloroplast

Explanation:

chloroplast is gained from the sun through the cytoplasm organelle

Which statement about how geologists study the ages of rock layers is true?
The law of superposition means that older rocks are on top.
Geologists can find the exact age of a rock by looking at its relative position.
The principle of original horizontality provides the basis for the law of superposition.
Relative age can be determined by using the concept of unconformity.

Answers

Answer: The principle of original horizontality provides the basis for the law of superposition.

Explanation:

The law of superposition in geology suggests that the rocks or sediments which are newly formed due to erosion and sedimentation of the original rocks lie above the old material. This law is supported by the principle of original horizontality according to which the newly formed sediments suspend horizontally in the layers of rocks and sediments under the effect of gravity. Thus an horizontal strata distinguishes the old and the new material.

Answer:

c

Explanation:

I took the quiz and got it right

ANSWER THIS FOR 20 POINTS!!!

Answers

Answer:

Thermometer with rhotomer

Explanation:

DNA is copied during the S Phase of Interphase.  Why do cells copy the DNA?

Answers

Answer:

During mitosis, a eukaryotic cell undergoes a carefully coordinated nuclear division that results in the formation of two genetically identical daughter cells. Then, at a critical point during interphase (called the S phase), the cell duplicates its chromosomes and ensures its systems are ready for cell division.

Explanation:

What type of organism really spread and diversified during the Cenozoic?
reptiles
fish
amphibians
mammals

Answers

D) mammals really diversified during the Cenozoic era

Mammals really spread and diversified during the Cenozoic era. So, the correct option is D.

What was Cenozoic era?

The Cenozoic Era is defined as the third of the major eras in Earth's history that began about 66 million years ago and extends to the present. This epoch was the interval of time during which the continents assumed their modern configurations and geographic positions during which the Earth's flora and fauna evolved towards the present.

The Cenozoic Era is called the "Age of the Mammals", while the typical landscapes of North America began to develop during the Cenozoic. Birds and mammals rose to prominence after the extinction of giant reptiles.

Thus, Mammals really spread and diversified during the Cenozoic era. So, the correct option is D.

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- The situation in which atmospheric gases trap the sun's heat and keep Earth's
surface warm is called
a. weather.
c. climate.
b. greenhouse effect.
d. primary succession.

Answers

Answer:

b. greenhouse effect.

Explanation:


Answer:

Greenhouse effect

Importance of using hand lens in classification of organisms​

Answers

Answer:

hand lens is used to make small object to appear larger hence visibility is easily attained

Please help!!!!!!!!!!!!!!!

Answers

Answer:

D

Explanation:

Brainliest?

GIVING BRAINLIEST> NEED HELP

Do the plants and animals on a farm make up an ecosystem? Why or why not?

Answers

Answer:

Yes they do

Explanation:

Animals and plants make up a ecosystem because the animals feed off the plants and the animals feed off of other animals.

Answer:

All living things in ecosystems are part of a food chain. A food chain is how energy is passed between things. farms are ecosystems. Farmers work with crops, animals, soils, and the weather to grow our food.

Explanation:

What are herbaceous an is it a flower?

Answers

Answer:

Herbaceous plants are plants that have non-woody stems. (Like annuals and biennials).

Help please!!! The answer doesn’t need to be long.

Answers

Answer:

The correct answer is - due to unicellular structure and some characteristics similar to both plants and animals.

Explanation:

Euglena is classified as the protoctists and they perform photosynthesis with the same basic process that plants use but they are able to move around and eat like animals too.

They are not classified as plants or animals as they are unicellular which means they are composed of only one cell, In order to be classified as a plant or animal, an organism has made of more than one cell.

Due to its unicellular body and characteristics similar to both plants and animals they are called protists.

Compare the two Food Web. Which ecosystem would be more likely to survive if a disease killed the grass?

a The forest ecosystem, because the animals would be able to eat other organisms.
b The grassland ecosystem, because it has many herbivores.
c he grass ecosystem, because several predators compete for food
d The forest ecosystem, because it has 3 top predators

Answers

Answer:

A

Explanation:

just A, I remember doing this in like 4th or 3rd grade don't really remember but I makes sense

Toxicology is used to determine
A. the classification of a pathogen
B. the vectors of a disease
C. how poisonous a substance is
D. what emerging viruses can cause disease
Other:

Answers

I think the answer is c
I think D but I’m not 100% sure

red marrow tissue interacts with which 2 body systems

Answers

Answer:

I believe it interacts with the lymphatic system (because it creates lymphocytes) and the circulatory system (because it creates red blood cells).

What is one of the biomolecules for which nitrogen is needed (hint: they help build muscles)?

Answers

It would be amino acids.

One of the biomolecules for which nitrogen is needed and that build muscles are the proteins, and the nitrogen is also found in the DNA and RNA that are present in the cells.

What is the significance of the nitrogen in the protein?

Proteins play many important roles in the body, including building and repairing tissues, and nitrogen is a critical component of proteins, as it is incorporated into the molecule as a part of the amino acids. Without nitrogen, proteins would not be able to form and perform their many important functions so a diet that is rich in protein is important for athletes and bodybuilders to build and repair muscle tissue.

As a result, of the biomolecules for which nitrogen is needed and that build muscles are the proteins, and the nitrogen is also found in the DNA and RNA that are present in the cells.

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The nervous system and the muscle system responds to stimuli to produce motion. The movements of

Answers

Answer:

skeletal

Explanation:

skeletal bones are involuntary

The __ is a series of geologic processes in which rock can form, change form one type to another, be destroyed, and form again.

Answers

Answer:

rock cycle

Explanation:

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