Answer:
chemical change changes the identity of a substance, while a physical change can just be observed. Some signs that a chemical change has occurred are, temperature change, forming bubbles, color change, new substance forming, there are more, but those are just some of which i now
Explanation:
hope this helped!!!<3
Answer:
Explanation:
The formation of a gas is a clue to chemical changes. The bubbles of gas that you observed form when an antacid is dropped into water is an example of change. ... After ice melts into liquid water, you can refreeze it into solid ice if the temperature drops. Freezing and melting are physical changes.
Test Tube 6 - Sugar (Sucrose) and Heated Lactase Enzyme: Demetri fills the sixth test tube one-quarter full of sugar. He then adds the heated lactase-and-water solution until the test tube is three-quarters full. He thoroughly mixes the solution and inserts the test strip for 30 seconds. Demetri then records the color of the test strip.
According to the test strips, which of these sugar solutions contained glucose?
None of the sugar solutions contained glucose, and when the glucose strips were put in the sugar, they did not change color.
A test strip is a strip made up of cloth or different types of paper. The strips are used in chemical and biological tests, they turn or change their color, and identify the substance.
Here, the test strip will not show any color, because glucose is not present in any of the solutions as mentioned.
Thus, the glucose strips did not change color when placed in the sugar, and none of the sugar solutions contained glucose.
Learn more about test strip, here:
#SPJ5
b. goblet cells
c. microvilli
d. pseudostratified ciliated columnar epithelium
e. stratified squamous epithelium
Answer:
d. pseudostratified ciliated columnar epithelium
Explanation:
Pseudostratified ciliated columnar epithelium
It is a type of epithelium , which is made up of cells of single layer .
The function of Pseudostratified epithelia is secretion or absorption .
Pseudostratified epithelia secretes mucus and cilai helps the movement of mucus .
The nucleus of these cells are present at different levels , thereby creating an illusion of cellular stratification .
Answer:
b. Goblet Cells
Explanation:
There are 3 types of epithelial cells in the large bronchi, namely:
1. Goblet Cells
2. Ciliated Cylindrical Cells
3. Brush Cells
Goblet cells are epithelial cells where the main function is to secrete mucin. These cells have a certain structure namely the rough endoplasmic reticulum, and mitochondria, nuclei, and other cell organelles are found in the basal cell section.
These cells are well distributed in the epithelial lining of the walls of organs such as the trachea, bronchi, small intestine, upper eyelid membrane, large intestine, and others. The ultimate goal is to lubricate these organs for the smooth functioning of them.
The most important function of goblet cells is to secrete mucus which is a thick liquid and consists of a glycosylated protein mucin that is suspended in an electrolyte solution. The main function of mucus which protects against stress and chemical damage, trapping and eliminating microorganisms and particles.
Learn More
About Menstrual Cycle brainly.com/question/2312836
Details
Class : College
Subject : Biology
Keywords
- Cell Surface
- Large Bronchi
a. neutron. c. proton.
b. ion. d. electron.
2. Two or more different atoms are combined in
definite proportions in any
a. symbol. c. element.
b. isotope. d. compound.
3. A covalent bond is formed by the
a. transfer of electrons. c. gaining of electrons.
b. sharing of electrons. d. losing of electrons.
4. When you shake sugar and sand together in a test
tube, you cause them to form a
a. compound. c. solution.
b. mixture. d. suspension.
5. A compound that produces hydrogen ions in
solution is a(an)
a. salt. c. base.
b. acid. d. polymer.
6. In polymerization, complex molecules are formed
by the joining together of
a. macromolecules. c. polymers.
b. carbohydrates. d. monomers.
8. Proteins are polymers formed from
a. lipids.
b. carbohydrates.
c. amino acids.
d. nucleic acids.
9. An enzyme speeds up a reaction by
a. lowering the activation energy.
b. raising the activation energy.
c. releasing energy.
d. absorbing energy.
10. In a chemical reaction, a reactant binds to an
enzyme at a region known as the
a. catalyst.
b. product.
c. substrate.
d. active site.
Answer:
I wont be able to answer all of them but: 1. C
2. Compound
Explanation:
A positive charge is called a proton, no charge is a neutron and a negative charge is a electron
When atoms are combined they are called a compound.
Hopes this helps you a bit.
disintegrate and one large megaspore.
O a gametophytes
O b. pollen sacs
O c pollen grains
O d. microspores
o e ovules
Meiosis and unequal cytoplasmic division in seed plant produce three small cells that disintegrate and one large megastore
B. Earthquakes
C. Volcanic activity
D. Chemical weathering
Answer:
Chemical weathering?
Explanation:
I have this question to I got stuck on it but I have a feeling it’s chemical weathering
B) pons.
C) midbrain.
D) diencephalons.
E) cerebellum.
Answer:
Medulla oblongata. (Ans. A)
Explanation:
Medulla oblongata is present in the brain, in front of the cerebellum. It controls the number of functions in the body. It helps to transfer messages to the thalamus & spinal cord, from the body.
Medulla oblongata helps to regulate breathing, blood pressure, heart rate, sneezing, and digestive activities. Medulla oblongata part of the brain is a center for respiration & circulation. Sensory & nerve cells from the midbrain & forebrain travel through the medulla. It receives its blood supply from many arteries (including anterior spinal, posterior inferior cerebellar and the vertebral artery's)
The medulla oblongata in the brain controls crucial autonomic functions like breathing, blood pressure, heart rate, and digestion.
The major centers concerned with autonomic control of breathing, blood pressure, heart rate, and digestive activities are located in the medulla oblongata (option A). The medulla oblongata is an important part of our brainstem, located just above the spinal cord. It is crucial as it controls various autonomic functions such as breathing, heart rate, blood pressure, and digestion.
#SPJ6