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Ne4ueva [31]
3 years ago
9

The notochord is responsible for which function in an embryo?

Biology
1 answer:
scZoUnD [109]3 years ago
7 0
Structural Support, Good luck
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A strand of DNA and a mutated strand are shown below
djverab [1.8K]

4 deletion

Explanation:

deletion is a type of genetic mutation involving the removal of a base pair

4 0
3 years ago
Write a summary about the cell theory
julia-pushkina [17]

Answer:

Over the next two centuries after the discoveries of Hooke and Leeuwenhoek, biologists found cells everywhere. Biologists in the early part of the 19th century suggested that all living things were made of cells, but the role of cells as the primary building block of life was not discovered until 1839 when two German scientists, Theodor Schwann, a zoologist, and Matthias Jakob Schleiden, a botanist, suggested that cells were the basic unit of structure and function of all living things. Later, in 1858, the German doctor Rudolf Virchow observed that cells divide to produce more cells. He proposed that all cells arise only from other cells. The collective observations of all three scientists form the Cell Theory, which states that:

all organisms are made up of one or more cells,

all the life functions of an organism occur within cells,

all cells come from preexisting cells.

Though no one point of the Cell Theory is more important than another, the theory clearly states that the functions necessary for life occur in the cell. Findings since the time of the original Cell Theory have enabled scientists to "modernize" the theory, including points related to biochemistry and molecular biology. The modern version of the Cell Theory includes:

all known living things are made up of one or more cells,

all living cells arise from pre-existing cells by division,

the cell is the fundamental unit of structure and function in all living organisms,

the activity of an organism depends on the total activity of independent cells,

energy flow (metabolism and biochemistry) occurs within cells,

cells contain hereditary information (DNA) which is passed from cell to cell during cell division,

all cells are basically the same in chemical composition in organisms of similar species.

The Cell Theory is one of the main principles of biology. The points of the theory have been found to be true for all life. As with any scientific theory, the Cell Theory is based on observations that over many years upheld the basic conclusions of Schwann’s 1839 paper. However, one of Schwann’s original conclusions stated that cells formed in a similar way to crystals. This observation, which refers to spontaneous generation of life, was discounted when Virchow proposed that all cells arise only from other cells. The Cell Theory has withstood intense examination of cells by modern powerful microscopes and other instruments. Scientists continue to use new techniques and equipment to look into cells to discover additional explanations for how they work.

Explanation:

Hope I helped!

4 0
2 years ago
Read 2 more answers
Which of the following energy transformation occur when humans use energy from food to exercise?
tatuchka [14]

Answer:

D. Chemical - mechanical - thermal

Explanation:

D because the food is chemical and the mechanical is the human excersice, and it results in thermal

7 0
2 years ago
(a) (1) State similar characteristics between the sea teak leaf and the weeping willow leaf
m_a_m_a [10]

1. Answer:

Both these leaves are quite similar because of their physical appearance. <em>The sea teak leaf and weeping willow leaf are narrow and elongated. However, a weeping willow leaf has tapered edges. </em>

The scientific names of sea teak and weeping willow plants are Podocarpus polystachyus and Salix babylonica.

  • The leaves of both these plants are simple regardless of their receptive compound appearance. This is due to the presence of complex vein structure on the leaf.

2. Answer:

<u>There many differences between sea teak leaf and weeping willow leaf.</u>

Sea teak leaf is 3-10 cm long while weeping willow leaf is only 6 cm long.  

Sea teak leaves are bright green and shiny while weeping willow leaves are green at top and white at the bottom.

<em>The bark of weeping willow can be used to obtain various medicines. Meanwhile, the leaves of sea teak plants are chewed to ease pain of joints. </em>

<u>Weeping willow trees are found in areas of China, South-West Asia and Europe. </u>

<u>Sea Teak trees are found in Indonesia, Malaysia etc.</u>

4 0
3 years ago
Does an allele that has no affect on a species fitness affected by natural selections
katen-ka-za [31]
Somewhat honestly yes
5 0
3 years ago
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