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Lemur [1.5K]
3 years ago
7

In what instances might punctuated equilibrium occur?

Biology
1 answer:
vekshin13 years ago
6 0

Punctuated equilibrium occur when the environment is rapidly changing  eliminate.

Answer: Option B

<u>Explanation:</u>

Punctuated equilibrium generally occurs when a sudden massive change occurs in the regular stream. The organisms are forced to adapt themselves to the new environment at the earliest and this process is induced to maintain the equilibrium.

This is the reason why you find an abrupt change in the species without undergoing slow morphological changes. Hence no intermediate forms can be found if you would examine the fossils. Hence to conclude when a species under rapid change to evolve itself to suit the environment it is punctuated equilibrium.

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What kind of lab equipment would you use to conduct a small chemical experiment
Alexandra [31]

Answer:

Beaker - A beaker is a glass container with a flat bottom and a small spout for pouring. It is used in the chemistry lab for mixing, heating, and stirring liquids. Beakers come in various sizes and are shaped like a cylinder.  

Chemistry lab beakers Beakers

Bunsen burner - The Bunsen burner is a metal tube that produces a flame from gas such as methane, propane, or butane. It is used in the lab for heating and sterilizing. The Bunsen burner is named after German chemist Robert Bunsen.  

Bunsen burner

Crucible - Crucibles are containers used for heating substances to very high temperatures. They are generally made from materials such as porcelain, nickel, and alumina.  

Erlenmeyer flask - This is a type of chemistry flask with a conical shaped body, a cylindrically shaped neck, and a flat bottom. It generally has measurement marks on the side. It is similar to a beaker, but has the cone shaped body. The cone shape reduces losses from evaporation and helps to prevent spills when stirring the liquid.  

Erlenmeyer flask

Funnel - A funnel is a pipe with a wide mouth that helps to pour substances into a container without spilling. In a chemistry lab, funnels are often used together with filters to separate a mixture.  

Funnel and flask

Gloves - Laboratory gloves are important to wear in order to protect the skin from chemical substances. Always listen to your teacher and make sure to wear gloves when performing experiments.  

Always wear gloves

Goggles - Goggles are very important when performing experiments of any kind. They can keep dangerous chemicals and other substances from damaging your eyes. Always wear your goggles in the lab!

Always wear goggles

Graduated cylinder - A tall skinny cylinder used to measure volumes. It is generally a more accurate way to measure volume than a typical beaker or flask.  

Graduated cylinder

Mortar and pestle - A mortar and pestle are used to crush and grind solids into a powder. The mortar is a bowl and the pestle is a small club-shaped tool. They are typically made from ceramic or stone.  

Mortar and pestle

Pipette - A narrow glass tube used to transfer liquids from one place to another. Pipettes sometimes are used for measurement. The accuracy of different pipettes varies widely.  

Pipette

Scoopula - A scoopula is a metal spatula-type utensil used to scoop up solids such as powders in a chemistry lab.  

Stirring rod - A skinny solid glass rod used in chemistry to mix chemicals and liquids. A stirring rod is typically about the length of a long straw and has rounded ends.  

Test tube - A test tube is a glass or plastic tube used for holding, mixing, and heating small quantities of liquid chemicals. Test tubes often have a flared top to help with pouring. They come in a variety of sizes.  

Test tube holder - A stand built for holding multiple test tubes.  

Test tube brush - A brush designed to help clean out test tubes.  

Test tube clamps - Clamps that hold test tubes while using them to heat up chemicals during a lab experiment.  

Test tubes in a holder

Thermometer - A device used for measuring the temperature of a substance.  

Triangle - A triangle made of clay pipes and wire that can withstand high temperatures. It is often used to hold a crucible.  

Wire gauze - A wire gauze is used to support a beaker or flask when heating. The wire gauze helps to spread the heat evenly.

7 0
3 years ago
Beta cells of the pancreatic islets of Langerhans act as glucose sensors, adjusting insulin output in response to blood glucose
LenKa [72]

Answer:

Explanation:

The host's immune response to the transplanted graft, which is commonly exhibited as pericapsular fibrotic overgrowth (PFO), is one of the key causes of defective encapsulated islets in (PFO).PFO creates a barrier upon this capsule surface that inhibits and impedes oxygen and nutrients from entering, resulting in islet cell deprivation, hypoxia, and/or death. This host immune response was missing under in vitro circumstances, which explains why glucose sensing and insulin release were more efficient than in vivo circumstances. Nonetheless, utilizing nanoporous encapsulation or modifying the microcapsular shape and geometry can solve these issues.

6 0
3 years ago
Test your understanding by predicting how the sodium-potassium pump becomes integrated into the outer cell membrane. Find the st
Mama L [17]

By predicting how the sodium-potassium pump becomes integrated into outer cell membrane. The prediction that is false is the mRNA coding into sodium pump is translated into the pump on two ribosomes.

<h3>What is sodium-potassium pump?</h3>

The sodium-potassium pump is an enzyme (an electrogenic transmembrane ATPase) present in the membrane of all animal cells. It is also known as sodium-potassium adenosine triphosphatase, Na+/K+-ATPase, or sodium-potassium ATPase. It serves a number of purposes in cell physiology.

The enzyme Na+/K+-ATPase is activated (i.e. it uses energy from ATP). Three sodium ions are exported and two potassium ions are imported for each ATP molecule used by the pump. As a result, each pump cycle results in the net export of one positive charge.

There are four distinct sodium pump isoforms or subtypes in mammals. Each has distinct qualities and patterns of tissue expression. The P-type ATPase family includes this enzyme.

To know more about enzyme visit: brainly.com/question/14953274

#SPJ4

7 0
11 months ago
Read 2 more answers
Which of the following terms is used to describe the physical characteristics of the individual?
Nitella [24]

Answer:

there are no answer choices lol

Explanation:

charactistics

physical features

profile

attributes

4 0
2 years ago
What is physiography ? ​
viva [34]

Answer:

physiography originally means the study of nature . but here  it means physical geography

Explanation:

hope it helps  

stay safe love u

btw can i get brainliest

8 0
3 years ago
Read 2 more answers
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