A student is studying mitosis, in which a cell divides to form two cells. Which of these shows the CORRECT mathematical model for the process if Nold shows the number of chromosomes in the parent cell and Nnew shows the number of chromosomes the individual daughter cells?

Answers

Answer 1
Answer: The correct answer for the question that is being presented above is this one: "A) Nnew = Nold." The CORRECT mathematical model for the process if Nold shows the number of chromosomes in the parent cell and Nnew shows the number of chromosomes the individual daughter cells is that A) Nnew = Nold 

Here are the following choices:
A) Nnew = Nold 

B) Nnew = Nold/2 

C) Nnew = 2 × Nold 

D) Nnew = 4 × Nold
Answer 2
Answer:

Answer:A

Explanation:just took the test


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Which of the following phyla have representatives that exhibit radial symmetry throughout their entire lives?a. Cnidariansb. Mollusksc. Arthropodsd. Annelids
How do animals obtain the nitrogen they use to make proteins and nucleic acids? A. by consuming plants or other animals B. by absorbing ammonia from bacteria growing in the roots of plants C. by breathing the nitrogen present in the atmosphere D. by absorbing nitrogen found in the soil
The term colon is often used instead of A. small intestine. B. rectum. C. cecum. D. large intestine.
According to the theory of _______, most of Earth's current species developed from distinctly different species which existed earlier in time
Plants in the rainforest contribute to precipitation there through transpiration. Please select the best answer from the choices provided T F

White blood cells defend the body from _____.disease
carbon monoxide
fungi
infection
blood clots

Answers

White blood cells are a type of immune cell that helps the body fight infection. They do this by engulfing and destroying bacteria, viruses, and other harmful microbes. Hence option D is correct.

They also produce antibodies, which are proteins that help the body recognize and fight specific invaders. Carbon monoxide, fungi, and blood clots are not directly attacked by white blood cells. However, they can all lead to infection, and white blood cells can play a role in fighting these infections.

For example, white blood cells can help to remove carbon monoxide from the body and prevent it from causing damage to tissues. They can also help to fight fungal infections by producing antibodies that target the fungi. And, white blood cells can help to break up blood clots that can lead to infection.

So, while white blood cells do not directly defend the body from carbon monoxide, fungi, or blood clots, they can play a role in preventing these conditions from leading to infection.

Therefore, option D, infection is correct.

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Answer:

Decease and Infection

Which biome covers the largest part of earth's surface?grassland
polar
marine
tropical rain forest

Answers

The oceans cover the earth's surface by approximately three-fourth or seventy five percent. It is the oldest and the largest biome. Thus, the marine biome is the largest biome which covers the earth's surface. This biome also is the common link among the other biomes in Earth.

Final answer:

The marine biome covers the largest part of Earth's surface, constituting about 71% of it. This biome is characterized by its saline water environment, diverse marine life, and significant role in maintaining the balance of Earth's ecosystem.

Explanation:

The biome that covers the largest part of Earth's surface is the marine biome, and it outflanks other biomes by a significant margin. Biomes are large biological environments characterized by certain types of flora and fauna, weather patterns, and other ecological traits. In our case, the various types of marine biomes altogether constitute approximately 71% of the Earth's surface, significantly outpacing the other biomes.

Characterized by its saline water-related features, this biome includes oceans, seas, reefs, and other bodies of saltwater. Marine life is incredibly diverse, encompassing extensive ranges of animal, plant, and microbial life forms. Unlike terrestrial biomes, such as the grassland, polar, and tropical rainforest, whose habitats are dominated by land-based life, the marine biome is characterized mainly by aquatic life.

It's important to note the significant role that the marine biome plays in the Earth's ecosystem. Its vast bodies of water regulate global weather patterns and provide a home for a massive quantity of the Earth's biodiversity.

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What is the range of the number of bacterial cultures per plate for the experimental groups?

Answers

Answer:the number of bacterial colonies after three days

Explanation:

Organisms from which kingdom are most likely to chemically digest their food outside their bodies through absorption?

Answers

The digestion of the food outside the body is actually referred to as external digestion. Organism from kingdomFungi  are most likely to chemically digest their food outside their bodies through absorption.

What are the characteristics of the kingdom Fungi?

The organisms of kingdomFungi are eukaryotic ones having a well developed as well as a membrane-bound nucleus.

The characteristics of this kingdom includes:

  • These are non-motile, heterotrophic organism.
  • Unicellular or filamentous.
  • Reproduce using spores.
  • Alternation of generation.
  • External nutrition or digestion outside the body.

Thus, it can be concluded that organisms from Fungikingdom are most likely to chemically digest their food outside their bodies through absorption.

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Fungi are the most likely but some protista and monera also absorb

A student was visiting a friend at her home. Her friend owned two cats. After playing with the cats fora while, the student began to sneeze. Her nose began to run and her eyes became red, watery, and
itchy. It also became hard for her to breathe. A few minutes after leaving her friend’s home, the
symptoms disappeared.
Provide a biological explanation for the symptoms the girl developed at her friend’s house. In your
response, be sure to:
• state one reason why her symptoms are not likely due to an infectious agent

Answers

Answer: This girl is allergic to cat´s hair.

Explanation:

The substance that provokes allergy to cats is a protein produced in the sebaceous glands and that can be found in the cats´ hair. It can be found in clothes, walls, beds, among other places. As it can also be suspended in air, a person can easily breathe it.  In a house with cats, these proteins are present in important amounts.

An allergic reaction is an abnormal response of the immunity system to a substance considered strange to the body, in this case, the protein or the cat´s hair.  These strange substances are called allergens.

The allergen gets in contact with the body for the first time in a sensibilization face. The immunity system considers that this is a strange dangerous substance for the body. In this first stage, the subject submitted to the presence of the allergen does not show any symptoms. But in a second contact, the organism reacts with allergic reactions.

There might appear symptoms in ayes and nose as irritations, stinging, cough, skin´s eruptions and difficulty to breath.

beacuse she must have a cat hair near her nose and it ismaking her sneeze

The bolus is liquefied in the ______ and it is now called chyme.A) esophagus
B) stomach
C) small intestine
D) mouth

Answers

Answer:

B) Stomach

Explanation:

A bolus is a food and saliva mixture formed in mouth during the first phase of digestion (chewing). After the mechanical and chemical breakdown of the bolus, chime is formed in stomach and then expelled through the pyloric valve, into the duodenum (the extraction of nutrients form chyme begins here). Chyme is semi-fluid mass with pH about 2 and it consists of partially digested food, water, HCl, and various digestive enzymes.