Answer:
Oxygen
Explanation:
took the test on k12
b.conditions in an organisms environment ensure the organisms survival
c.birds and reptiles share a number of inherited characteristics
d. tigers are so different from cheetahs
Answer:
The correct answer would be c. birds and reptiles share a number of inherited characteristics.
In evolutionary biology, the principle of common ancestors or descent explains how different groups of organisms share a common ancestor.
In other words, different groups of organisms are believed to evolve from a common ancestor.
The groups which share recent common ancestor share a number of common inherited characters.
The groups which share distant common ancestor share less common characters.
Thus, birds and reptiles share a number of characters as they have evolved from common descent or ancestor.
Answer:
1. It is present as the outermost layer in animal cells and lies below the cell wall in plant cells.
2. The cell membrane surrounds the cytoplasm of living cells, physically separating the intracellular components from the extracellular environment.
3. The cell membrane is semi-permeable, ie, it allows some substances to pass through it and does not allow others.
Explanation: The cell membrane (or plasma membrane) surrounds all living cells, and is the cell's most important organelle. It controls how substances can move in and out of the cell and is responsible for many other properties of the cell as well.The membranes that surround the nucleus and other organelles are almost identical to the cell membrane. Membranes are composed of phospholipids,proteins and carbohydrates arranged in a fluid mosaic structure,
Answer: small protects cell and let's things in
Explanation: because.
Fur color varies with the season for protection.
B.
Colorful peacock feathers attract a female.
C.
A large nose on a monkey attracts mates.
D.
Geese migrate south in the winter.
the answer is d. structural is ohysica. geese flying is not oyhsical cjamce.
Answer:
A chromosome is a DNA (deoxyribonucleic acid) molecule with part or all of the genetic material (genome) of an organism. Most eukaryotic chromosomes include packaging proteins which, aided by chaperone proteins, bind to and condense the DNA molecule to prevent it from becoming an unmanageable tangle. This three-dimensional genome structure plays a significant role in transcriptional regulation.Chromosomes are normally visible under a light microscope only when the cell is undergoing the metaphase of cell division (where all chromosomes are aligned in the center of the cell in their condensed form). Before this happens, every chromosome is copied once (S phase), and the copy is joined to the original by a centromere, resulting either in an X-shaped structure (pictured here) if the centromere is located in the middle of the chromosome or a two-arm structure if the centromere is located near one of the ends. The original chromosome and the copy are now called sister chromatids. During metaphase the X-shape structure is called a metaphase chromosome. In this highly condensed form chromosomes are easiest to distinguish and study.In animal cells, chromosomes reach their highest compaction level in anaphase during chromosome segregation.
Chromosomal recombination during meiosis and subsequent sexual reproduction play a significant role in genetic diversity. If these structures are manipulated incorrectly, through processes known as chromosomal instability and translocation, the cell may undergo mitotic catastrophe. Usually, this will make the cell initiate apoptosis leading to its own death, but sometimes mutations in the cell hamper this process and thus cause progression of cancer
The ribosome plays a significant part in protein amalgamation inside a cell. Its fundamental reason is to encourage the interpretation of hereditary data from courier RNA (mRNA) into proteins.
The ribosome plays a significant part in protein amalgamation inside a cell. Its fundamental reason is to encourage the interpretation of hereditary data from courier RNA (mRNA) into proteins.
Proteins are imperative particles that perform different capacities within the cell, counting enzymatic responses, auxiliary back, cell signaling, and transportation of particles. The ribosome acts as a atomic machine that collects amino acids, the building pieces of proteins, into particular groupings managed by the mRNA format.
The ribosome comprises of two subunits, a huge subunit and a little subunit, each composed of proteins and ribosomal RNA (rRNA). The little subunit ties to the mRNA particle, whereas the huge subunit joins amino acids together to create a polypeptide chain.
Learn more about ribosome below.
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Answer:
To make Protein of course!
Explanation:
Function of Ribosomes. Ribosomes are a cell structure that makes protein. Protein is needed for many cell functions such as repairing damage or directing chemical processes. Ribosomes can be found floating within the cytoplasm or attached to the endoplasmic reticulum. ... Proteins are an essential part of all cells.