How Many Amur Leopards Are Left In The World 2019 (2023)

Answer:

mutations

Explanation:

Mutations are changes in DNA sequence that can create genetic variation within the population and thus are the ultimate source of new alleles . Mutations are important for evolution because of their ability to form a new genetic variant (allele) that can be spread to the offspring. If a new variant of a trait formed by a mutation is advantageous and helps the organism to survive and reproduce, it is going to be favourable by natural selection. That variation will more likely be passed to the next generation and remain over time.

Answer:

A. play a role establishing and maintaining membrane lipid asymmetry

Explanation:

Proteins that move move certain phospholipids between leaflets are transmembrane proteins via "flip-flop" transition have also the possibility to maintain membrane lipid asymmetry. There are few types of such proteins:

• flipases-move lipids from the exterior to the interior side of the membrane, energy required
• flopases-move lipids in reverse comparing to flipases, energy required
• scramblases-no energy required, bidirectional

Because of the action of those proteins, cytosolic side of plasma membrane differs from exoplasmic side (asymmetry).

Answer:

in the human body

Explanation:

Endogenous infectious agents are agents that cause the diseases and are normally located within the human body. Before causing the disease these agents are asymptomatic. Since, endogenous infection is caused by bacteria of human microflora it usually happens when barrier that is located between sterile and non-sterile tissues is damaged.

Answer:

Genetic material

Explanation:

Conjugation is one of the ways by which bacteria exchange their genetic material (horizontal gene transfer). Two bacterial cells must physically connect in order to perform the conjugation. The linking occurs through a pilus.

Pilus is an appendage on the surface of bacteria cell and it is also called fimbria. Pilus is filamentous, tubular and composed of oligomeric proteins-pilin.

Donor cell contain pilus that will attach to the recipient bacterial cell and induce the transfer.

There are two main types of cells among living organisms:

• Eukaryotic cell (plants, animals, fungi) which is more compound, conntains nucleus with genetic material in it, membrane-bound organelles (mitochondria, Golgi apparatus, lysosomes etc). Because of their complex structure, the process within such cells are often more comlex then those in prokaryotes. Eukaryotic organisms are usually multicellular

• Prokaryotic cell is simple cell found in Archea and Bacteria kingdom. It doesn't have nucleus neither membrane-bound organelles. Genetic material of these cell is located within the cytoplasm together with proteins and metabolites. First living cell was prokaryotic cell. Organisms that are prokaryotic are usually unicellular.

Answer: a. 2

If there is a dominant allele, it will overpower the recessive allele for albinism; therefore, a person must have 2 recessive alleles to have this recessive trait

Answer:

2

Explanation:

A pex

Answer:

A frogs heart has 3 chambers. Two atria and a single ventricle.

Answer:

Ah, easy! I study frogs, ya know. Okay, so a frog's heart has chambers! I read it in a National Geographic animal encyclopedia. Credit Dr. Lucy Spelman.

Explanation:

Here's some other facts - The heart is dark red, The chambers include two atria and one ventricle. I could go one forever, but I won't. Hope you get an A+!

Changing a single amino acid in a protein consisting of 433 amino acids would alter the structure of the protein encoded by the amino acid sequence.

• A protein is a biological molecule that performs varying functions in the cell. Some of the functions of proteins include; regulating biochemical reactions, repair of damaged tissues etc.

• Proteins are generally made up of monomers called AMINO ACIDS. Amino acids are precursors of protein molecules. The sequence of amino acids determine the structure and function of the resultant protein molecule.

• Hence, changing a single amino acid in a protein consisting of 433 amino acids would alter the structure of the protein encoded by the amino acid sequence.

Learn more at: brainly.com/question/12810773?referrer=searchResults

Hey there! :D

Changing amino acids in a protein of 433 amino acids would change the entire protein. It would no longer be the same. It depends on where the protein is affected, the first sequence, or the last one. One wrong nucleotide leading to a wrong amino acid affects the whole chain and destroys the proteins natrual purpose.

I hope this helps!

~kaikers

Cells are limited in size by their surface area-to-volume ratio, and that explains the relationship between the surface area of a cell and its volume, as the volume increases much faster than the surface area when the cell grows.

What is the significance of the surface-to-volume ratio?

The surface area-to-volume ratio becomes a limiting factor as cells grow in size, and it decreases because the surface area can no longer keep up with the demands of the cell as well as a decrease in the efficiency of processes such as diffusion and cellular respiration.

Hence, cells are limited in size by their surface area-to-volume ratio, and that explains the relationship between the surface area of a cell and its volume, as the volume increases much faster than the surface area when the cell grows.

Learn more about the surface-to-volume ratio here.

brainly.com/question/13330873

#SPJ6

Answer:

nonsense mutation

Explanation:

A point mutation is a mutation within DNA sequence when a single nucleotide is changed (substitued, deleted, added). They can have various effects depending on the type of point mutation. For example, nonsense mutations are point mutations that result in a premature stop codon. UAC codon codes for the tyrosine amino acid, while UAG is stop codon. A s a consequence, protein product is usually unfunctional because it is incomplete.

Nonsense mutations can cause genetic disorders (e.g. thalassemia).

Answer:

be part of the cell signaling process

Explanation:

Glycoproteins and glycolipids are proteins and lipids with carbohydrate chain attached to it. They are an important component of the cell membrane with many roles:

• stabilizing membrane structure-because of their ability to bind water molecules via hydrogen bonds
• cell signaling-they are often membrane receptors for the hormones and neurotrasmitters
• cell attachment (adhesion)-for the connection between cells
• cell recognition-they can act as antigens on the cell surface (immune role)

Answer:

The climate

Explanation:

The development and existence of any type of biome is directly dependent on the climate conditions. The areas that have warm climate throughout the whole year and lot of precipitation are enabling the development of the tropical rainforest biomes. The areas that have hot and dry climates are providing the conditions for the existence of the desert biomes. The places that have changes of seasons are enabling the development of the temperate biomes, and the places that are very cold and dry are suitable for the development of the arctic biomes. The climate is detrimental for the development of each biome as it affects the temperature, humidity, precipitation, which in turn results in the development of certain types of soil, vegetation, and animals that can exist in those conditions. The climate is the defining factor, but it also has to be taken in consideration that the climate depends on other factors that have to be mentioned, like the latitude, elevation, geography of the area, ocean currents, air masses etc.

Answer:

Bronchospasm

Explanation:

Bronchospasm is known to be a condition that results from the contraction of the muscles that is found in the wall of the bronchioles which result into obstruction and narrowing of the respiratory airway. Thus, substance released from basophils or mast cell under the control of anaphylatoxin usually causes Bronchospasm. Furthermore, Bronchospasm is commonly caused by asthma and can also be caused by allergic reactions, respiratory infection, and chronic lung diseases.

Answer:

False

Explanation:

Climate has a major role in escalating the rate of weathering. During excessive hot season, the large rock pieces in dry and arid areas develop cracks which further increases in size when rain falls on it or strong air strikes against it.

During humid and cold climatic condition, fissures are developed into rocks due to cyclic freezing and thawing process.

Hence, given statement is false.

Answer:

true

Explanation:

it does effect it with it being to hot or to cold

Answer:

a

Explanation:

Answer:

D

Explanation:

These colors are also referred to as primary colors. When mixed in different proportions, they can produce a variety of secondary and tertiary colors and this is how the human eye is also to perceive many colors even with only these three eye pigments.

Answer:

Analogous structures

Explanation:

These structures are similar but not derived from the common ancestor like homologous structures. Analogous structures are formed as a result of convergent evolution-type of evolution in which organisms develop on similar way but independently. An example of analogous structures are wings. Birds, insects and bats all have wings, with the same purpose (flight) but they evolved in their own way.