BIOLOGY HIGH SCHOOL

What is the silly scientific name for an unsharpened pencil?What is the silly scientific name for a piece of white chalk?

Answers

Answer 1
Answer:

Answer:

Unsharpened Pencil - Wadget

White Chalk - Screecher

Explanation:

Related Questions

Which statement correctly describes both gases and liquids?
What is the missing word? In mature animals, cell division is mainly restricted to repair and __________ of old cells
Which of the following is not a natural cause of climatic change?A.Human activityB. Solar activity C. Earth's tiltD. Volcanic activity
Name a difference between a plant cell and an animal cell.
This organ is always found at the core of all animal cells and plant cells

How do conservation tillage practices lead to agricultural sustainability?

Answers

The conservation of tillage practices leads to agricultural sustainability by protecting the farmer's crops from insects and other pests, thus, it reduces the need for the farmers to buy pesticides for the crops, since the tillage method prevents insects.

A few bacteria are placed in a nutrient solution. after several hours thousands of bacteria are present. which life activities are primarily responsible for this?

Answers

The answer is "Digestion and Reproduction"

When placing few bacteria on a nutrient solution, and for several hours it multiplies. The activities which take place in the scenario is the digestion and reproduction. Digestion occurs when the bacteria fed on the nutrient solution and Reproduction occurs when the bacteria gives birth to new bacteria.

Explain why inflammation cannot occur in an ameba or in a dead body. Does inflammation have beneficial or noxious effects on the human body?

Answers

Answer:

Inflammation occurs only in live tissues and multicellular organisms

Explanation:

Inflammation is a response to foreign antigen by the bodies immune system. Where chemicals from the white blood cells are released to the blood or affected tissue.  

It cannot occur in dead bodies because the cells are dead too.

Amoeba is a single celled organism that cannot posses the complex components of the immune system.

Inflammation helps eliminate the initial cause and initiates tissue repair

Due to increase of blood flow to the affected region, it may cause redness and pain.

 

A critical feature of the plasma membrane is that it is selectively permeable. this allows the plasma membrane to regulate transport across cellular boundaries--a function essential to any cell's existence. how does phospholipid structure prevent certain molecules from crossing the plasma membrane freely?

Answers

The structure of the plasma membrane makes it selectively permeable, enabling it to regulate the transport substance into and out of the cell, such as
- small, non polar molecules are hydrophobic
- Polar molecules and ions are hydrophilic
- Polar molecules and ion usually pass with the help of protein

hope this helps

The factor which makes the permeability of the plasma membrane a main reason for the cells existence is that this condition makes the cell a to take in important required substances and throw out waste. Thus, the life of the cell is based the fact that the plasma membrane is selectively permeable.

Further Explanation:

Eukaryotic cells are the cells which have membrane-bound organelles, membrane-bound nucleus, and several chromosomes. They have a true nucleus and have some similarity with prokaryotic cells like plasma membrane, cytoplasm, and ribosomes.

Plasma membrane is selectively permeable as they allow only certain molecule to pass through them. This permeability is dependent on many factors one of them being the need of the molecule by the cell. The membrane of the cell is made up of following components;

1. Phospholipid bilayer

2. Transmembrane proteins

3. Interior protein network

4. Cell surface markers

Out of these components the one responsible for maintaining the movement of the chemicals or molecules across the membrane is the phospholipid bilayer and the transmembrane proteins. The major component which acts as an permeability barrier is the phospholipid bilayer.

Learn more:

1. Learn more about which structure is unique to eukaryotic cells brainly.com/question/4493579

2. Learn more about the purpose of transfer RNA brainly.com/question/236807

3. Learn more about translation brainly.com/question/273550

Answer Details:

Grade: High School

Subject: Biology

Chapter: Cell biology

Keywords:

Eukaryotic cell, DNA, cell membrane, ribosomes, nucleus, plasma membrane, cytoplasm, chromosomes, endoplasmic reticulum, nucleolus, phospholipid bilayer, transmembrane proteins.

25. to conserve water, an animals kidneys can pump ions across cell membranes, allowing water to move by________?

Answers

Answer:

Active Diffusion

Explanation:

In active transport, a molecule is transported against its gradient which means the flow of molecule is from regions of low concentration to regions of high concentration. In order to carryout such transports, external energy is applied through biological pumps such as sodium-potassium pump (Na+/K+ ATPase)  which maintains the resting potential of the cell.  

Some times the energy produced by ATP is directly used and this process is known as primary active transport/diffusion
active deffusion.. this way the water is retained and the unnecessary salts ions are expelled out.

What does melanin mean?

Answers

a dark brown to black pigment occurring in the hair, skin, and iris of the eye in people and animals. It is responsible for tanning of skin exposed to sunlight.
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In a certain plant, yellow leaves are dominant (Y) and red leaves are recessive (y). A plant with genotype Yy and a plant with Yy are crossed. If they have four offspring, how many would you predict would have red leaves?