How does fertilization produce new offspring?

How long have scientists understood the role of DNA in heredity

exis [7]

Answer:

The discovery of DNA occurred in 1869 by Swiss-born biochemist Fredrich Miescher, it took more than 80 years for its importance to be fully realized. The experiments reported in Oswald Avery and his colleagues' landmark paper of 1944 provided convincing proof that DNA was the hereditary material.

6 0

3 years ago

4) If a dead organism is preserved as a fossil, which body tissues are most likely to survive? Why?

IrinaVladis [17]

The answer is hard tissue.

Usually, hard tissue, such as bones and teeth or exoskeleton is much more preserved than soft tissue (organs, skin, etc.). Fossils become fossils by a process of mineralization. Hard tissues are more mineralized during life than organs. So it is no surprise that hard tissues take part in the process of mineralization and is preserved in fossils, unlike soft tissues.

8 0

4 years ago

1. Describe two characteristics or features that make prokaryotic and eukaryofic cells similar to each other. At least one of th

Tcecarenko [31]

Answer:

1.The group of organisms with cells which contain of nucleus and other membrane bound organelles are called Eukaryotes. These organisms have their DNA arranged in the chromosomes, bounded by histones proteins. They have diversity of forms, thus they can be colonial, unicellular or multicellular in forms. Their cells reproduced by mitosis and meiosis for gamete formation.

Reproduction can be sexual and asexual. Their ribosomes are found in the cytosol, and they are larger than that in prokaryotes, but ribosomes in chloroplast and mitochondria are similar as that in the Prokaryotes (70s). Plants and complex animal cells are examples.

Group of unicellular organisms which lack membrane bound nucleus, and other organelles, are called Prokaryotes. Their two domains are the bacteria and archaea. They reproduce asexually only, by fusion of gametes. Due to lack of membrane bound organelles, their water soluble components and cellular inclusions (metabolites and DNA) are found in the cytoplasm bounded by the cell membrane.

When viewed under microscope. Prokaryotes are similar to Eukaryotes as follows.

Note :Due to repeated technical difficulties in submitting the full answers( word checkers), the full solution to the problem is in the attachment.

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3 0

3 years ago

The structural classification of the pubic symphysis joint is ___________, and the functional classification is ___________

Kruka [31]

<h2>Classification of Symphysis</h2>

Explanation:

The structural classification of the pubic symphysis joint is fibrous, and the functional classification is divides joints into three categories synarthroses, amphiarthroses, and diarthroses.

Joints are utilitarian intersections between at least two bones.
Joints tie the skeleton together, to give structure and permit muscles to move issues that remains to be worked out specific undertakings, for example, running, coming to and getting a handle on.
There are numerous kinds of joints the most well-known of which are synovial joints. These joints are unreservedly moveable.
Joints can be grouped by the sort of the tissue present (sinewy, cartilaginous or synovial), or by the level of development allowed (synarthrosis, amphiarthrosis or diarthrosis).
This sort of joint accommodates a solid association between the neighboring bones, which serves to secure inward structures, for example, the mind or heart.
Models incorporate and the cartilaginous manubriosternal joint The stringy joints of the skull sutures

4 0

3 years ago

What process in animal cells required oxygen

Debora [2.8K]

I think you are referring to the Cellular respiration where you take in glucose and oxygen and make atp, lactic acid, sugar, and alcohol(basically fermentation)

6 0

3 years ago