Questions posted in Biology

Active immunity can be natural or artificially developed. Naturally acquired - a person is exposed to a live pathogen, develops an immune response - and then creates memory T and B cells. Artificially acquired - a person is given a vaccine (which contains the antigen). This stimulates the same response, without the symptoms of the disease.

1. food meaning their source food could no longer be there so they have to search for something else to eat in order for survival 
2. weather meaning the weather of which that animal is used to has chnaged for ex.) in Antarctica the weather is getting warmer so the polar bears and pennguins can adapt or die 

I would say a sheep or kitten. Sheep are both smart and shy and a kitten is the same too. Hope this helps! Pls mark me as brainliest! :)

The binomial nomenclature for a human is Homo Sapiens. Binomial means two names, and nomenclature means to chose a name. Therefore the two word classification of a human being is homo sapiens. (It also means wise man)

Pathogens may enter you but there is a layer (almost like a wall) that they will have to get through first (in the skin) bacteria can also kill pathogens. The immune system will produce antibodies that will also kill off pathogens.

I can not really be predicted

Answer:

The density of an object refers to an extensive property, which signifies that it does not rely upon the concentration of the substance. Each and every substance in this world exhibits its characteristic density. Therefore, it would not influence the rate of melting as it does not fluctuate. However, adding the objects could accelerate the procedure as each object exhibits energy in the form of heat, which could provoke the mediating force for the melting process.  

Answer:

Air Pollution can be defined as the pressence of any unwanted substances in air.

This is very harmful to the environment, animals and human beings. It can adversely effect the vegetation and health of human beings.

It can create acid rain, make the respiratory or health condition even worse.

It can destroy several types of vegetation that is susceptible to pollution.

Darwin’s research showed that finches beaks are different to fit their food source. It also started the theories of evolution and natural selection. The Grant’s research on the Galapagos Islands showed that evolution exists and can happen over a course of two years. They proved Darwin’s theories are true. Since all the plants and animals are native to the islands, they had to adapt to the new food source and climate. Beaks, size, etc. are all changes made to these organisms to be able to live on the islands. 

The Galapagos Islands are located in Ecuador and sit on the Pacific Ocean. The Galapagos Islands were formed from 3 million to 5 million years ago. Volcanic eruptions typically shield volcanoes formed the islands. They are located over a “particularly hot mantel” that causes volcanic activity. The outcome of many eruptions were islands because the left overs were pushed to the surface. The Galapagos islands are pretty big reaching an area of 3,093 miles. The temperatures range from 69 to 84 degrees creating a typically warm climate. 

Darwin studied medicine at age 16, but became fascinated specimens around the globe. He developed theories of natural selection and evolution. While he was on the Galapagos islands, he studied thirteen different species of finches.

 He observed finches and different beak structures. He observed their ability to consume foods such as nuts, bugs, and fruit. He concluded all were related to their beaks. For example, long, slender beaks are good to reach in the flowers of a cactus.

Charles concluded that the finches beaks are examples of adaptive radiation. To fit in the island, they had to adapt to the conditions. This lead to Charles’ theory of natural selection. 

Charles came to the conclusion of evolution and natural selection. Natural selection is the process where organisms adapt to their environment to survive and produce more offspring. Evolution is where different kinds of living organisms are thought to have developed. These theories have changed science forever and leave today’s scientists marveling of his theories.

I hope this helps:)

The algal blooms can be defined as the rapid growth of the algae in the water bodies. These algal blooms are a result of the excess amounts of nutrients, such as phosphorus, in the water. These excess nutrients are released in the fresh water bodies as a result of the fertilizers that are washed away from the agricultural fields nearby. The fertilizers are rich in nutrients such as phosphorus to help the plant to grow. When they get washed into the water bodies, they promote the growth of the algae leading to algal bloom.

Hence, the correct answer is 'Option C - The nutrients are a part of the fertilizers that are often washed away into ponds'.

A conclusion is a final answer backed by evidence. An inference is a reasonable guess.

Kidneys are important in homeostasis as they control the blood water level and the regulation of salt and iron contents within the body. See related links for more info. Kidneys are important in homeostasis as they control the blood water level and the regulation of salt and iron contents within the body.


hope that helps! :)

Correct answer: B). Caused a huge decline in native clam and mussel populations.  

The Zebra mussels are the water animals that are D- shell, which is made up of hinged valves that are joined together by a ligament. The main problem with them is that they filter water in order to eat the plankton. As they eat the plankton, it creates a competition between them and fish for food.

They are known to kill mussels population by attaching to their shells, they also out compete for food native mussels.

Hence, the correct answer would be option B.

Desert
plants- shrubs get moisture from morning dew

cacti holds a lot of water

elephants tree uses huge trunk to save water
animals coyote has fur to keep cool

tortuous uses back legs to help dig

Jackrabbit uses ears to help cool down

Arctic Tundra-
animal's- polar bear, reindeer, Arctic fox
plants- Arctic Willow, bearberry, Arctic moss

The Savanna
animals- lion, elephant, zebra
plants- Jarrah tree, Jackuberry Tree, Elephant grass

I'm sorry I could not tell u all the information for the biomes. this is all I had time to right

Answer: Option C

Explanation:

The nutrients that is carried away by the water from the agricultural wastes are part of the fertilizer that is put on to increase the growth of the plants.

The nutrients from the fertilizer is carried away by the water that passed from the field to the nearby freshwater source.

The water carries phosphorus which increases the growth of the algal bloom in water. The algae uses all the oxygen from the water and makes the water deficient of oxygen.

Hence, the correct answer is option C

Answer:

The correct answer would be option D. Habitat destruction.

Habitat destruction contributes the most in the loss of biodiversity these days.

More and more space is required to fulfill the demands of increasing human population.

More and more natural habitats are being destroyed for building houses, agriculture, building dams, roads, pipes, industries et cetera.

Consequently, a large number of wild species die due to lack of resources.

Answer and Explanation:

Cytoplasm: the cytoplasm is in the space between the nucleus and the plasma membrane. It supports diferent kinds of structures as the organelles.Cytoplasm is as the interior environment of cell. The cytoskeleton in the cytoplasm provedes support and movement.

Centrioles,: they help to move and organize chromosome during cell reproduction.

Cell wall: is the boundary of the cell and encloses the cytoplasm. It leads the movement of certain substances and bars the passage of other substances.

It's a comunication device because some pf its proteins serve as receptors.

CHLOROPLAST: It converts light energy into chemical energy. It produces energy through photosynthesis.

I think it would be gravity

1.) animals can live in all types of different weather and humans cant
2.) Humans can talk animals cant
3.) Animals hunt for there food humans have to buy theres

Density= mass/volume
2.70 = 44/ volume
44/2.70 = 16.2962963
The volume is 16.3

  Carbon dioxide is generated in tissues as a byproduct of normal metabolism. It dissolves in blood plasma to form carbonic acid (H2CO3); red blood cell (RBC) carbonic anhydrase catalyzes this reaction. Carbonic acid then spontaneously dissociates to form bicarbonate (HCO3−) and a hydrogen ion (H+). In response to the decrease in intracellular pCO2, more CO2 passively diffuses into the cell.

Cell membranes are generally impermeable to charged ions (i.e. H+, HCO3− ) but RBCs are able to exchange bicarbonate for chloride using the anion exchanger protein Band 3. Thus, the rise in intracellular bicarbonate leads to bicarbonate export and chloride intake. The term "chloride shift" refers to this exchange. Consequently, chloride concentration is lower in systemic venous blood than in systemic arterial blood: high venous pCO2 leads to bicarbonate production in RBCs, which then leaves the RBC in exchange for chloride coming in.[2]

Answer:

In an area that is prone to earthquakes, we could store household items in a way that will minimize chances of injury and make sure that the bigger items or furniture such as shelves are fastened to walls. We can also try not to sleep under a window, and should always have an emergency kit assembled. You can also have plans with your family as to where to go if caught in an Earthquake.( also might want to change the wording because this was my answer. Just change they wording into your own to show that you understand it and am not just copying me! :)  )

Hope this helps!

Answer:

c. A filter feeder

Explanation:

• Filter feeders are those organisms that feed on the food particles by straining them from water and then taking them in.
• The straining of water takes place through specialized structures which acts as filters.
• Since in the given case, the bivalves are capturing the food particles that are flowing over their gills, they are performing filer feeding.

I believe it's the Circulatory system

The answer is A because invasive species are one of the biggest extinction

Answer:

vacuoles -

Vacuoles are membrane-bound sacs within the cytoplasm of a cell that function in several different ways. In mature plant cells, vacuoles tend to be very large and are extremely important in providing structural support, as well as serving functions such as storage, waste disposal, protection, and growth.

Lysosomes

One of the key organelles involved in digestion and waste removal is the lysosome. Lysosomes are organelles that contain digestive enzymes. They digest excess or worn out organelles, food particles, and engulfed viruses or bacteria. Lysosomes are like the stomach of the cell.

Mitochondrion

Mitochondria are known as the powerhouses of the cell. They are organelles that act like a digestive system which takes in nutrients, breaks them down, and creates energy rich molecules for the cell. The biochemical processes of the cell are known as cellular respiration.Cell membrane

The amygdala would recognize the danger and immediately do something about it, it typically puts us in a fight or flight mode, in this case it is flight as we are moving our hand away from a burning stove that could cause serious damage. Your brain knows that a burning stove is bad to touch because many a person has told you that in your life, ex. "Don't leave the stove running when you are not in the room." So naturally you would'nt.

You need to be way more specific

Slate is composed of mineral quartz and muscovite or illite, it is usually joined by biotite, chlorite, hematite and pyrite.

Aragonite is a carbonate material, it is one of the most common materials there is that has a source of coCO3 (Calcium Carbonate.)