Answer:
A. 2 cells are made from one cell
Answer:
Salt water fish are perfectly adapted to their salty environment and need osmosis to live. The replacement fluid taken on to replace the lost water is desalinated by a process known as diffusion. Diffusion allows fish to live in a state of constant osmosis
Answer:
Option A, Jean-Baptiste Lamarck
Explanation:
Options
a. Jean-Baptiste Lamarck
b. Georges Cuvier
c. Thomas Malthus
d. Charles Darwin
e. Charles Lyell
Solution
The second law of Lamarck stated that all living organism eventually adapt to the environment in which they live. However, such adaptations are continuous thereby leading to evolution of species gradually over a long period of time. Lamarck published his theory of evolution in 1801, while Darwin published his book on “origin of species in 1859.
The result predicted by Lamarck regarding impact of environment on evolution was further supported by Darwin, and future scientist.
Hence, option A is correct
Answer:
The answer to your question is:
Explanation:
When carbon attached to oxygen, they form covalent bonds, in these kind of bonds, atoms share electrons to acquire stability.
Atoms acquire stability when they have 8 electrons in their outermost shell.
When carbon share electrons with oxygen they acquire 8 electrons and they are stable.
See the picture below
Red is carbon and blue oxygen
Scientists first discovered chromosomes in the nineteenth century, when they were gazing at cells through light microscopes. But how did they figure out what chromosomes do? And how did they link chromosomes — and the specific genes within them — to the concept of inheritance? After a long period of observational studies through microscopes, several experiments with fruit flies provided the first evidence.
What is a gene?
Physically, a gene is a segment (or segments) of a chromosome. Functionally, a gene can play many different roles within a cell. Today, most scientists agree that genes correspond to one or more DNA sequences that carry the coding information required to produce a specific protein, and that protein in turn carries out a particular function within the cell. Scientists also know that the DNA that makes up genes is packed into structures called chromosomes, and that somatic cells contain twice as many chromosomes as gametes (i.e., sperm and egg cells).
But what were the key scientific discoveries that helped establish these principles? As it turns out, the connections between genes, chromosomes, DNA, and heredity were not recognized until long after researchers caught their initial glimpse of chromosomes. The following sections present an abbreviated summary of the major discoveries that revealed these connections.
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