Answer: The correct answer to the question is option D
CAST FOSSILS.
Explanation: To understand what a cast fossil really is,let's look at what a fossil is generally.
Fossils are traces of what are formed and left of living things which dates back to a long time ago. Fossils are often found in sedimentary rocks examples; Shales, limestone and sandstone.Fossils are left over animals/plants.
Not all fossils are remains of living things.
There are different types of fossils; FROZEN FOSSILS; When an animal is trapped and freezed as a result of drop in temperature.
IMPRINT FOSSILS; They are prints made and left when animals walk or move over clays,these imprints dries and get covered by other sediments.plants also leave imprint fossils.
AMBER FOSSILS; These are fossils that are formed when tiny insects and bugs become trapped in saps of trees, when these saps dries up,they become hard and and an Amber is formed.(a seminiferous material).
CAST FOSSILS; These are fossils that form as a result of the death of plant,animal or any organism,when this happens,chemical reaction occurs which brings about a degradation in the bones and flesh if the organism,cavities are formed and minerals are deposited in those cavities bringing about a cast which looks like the original form or image of the organism.
D. Things that are kept constant.
Controls are used in an experiment where some variable is being changed. By only changing one thing and keeping the others constant they can make sure that any change in the results is caused by the variable and not the constant, since the constant didn’t change.
Answer:
A fertilized egg cell is a single cell that can develop into one or more specific types of cells in the body. These cells include neurons, blood cells, skin cells, muscle cells, and many others. This process involves two major steps: differentiation and specialization.
During differentiation, each of the many types of cells in the body has to be developed separately. For example, skin cells have to differentiate into hair follicles, sweat glands, sebaceous glands, and so on. The developing brain cells must differentiate into a specific set of brain cells (neurons) that make up the cerebral cortex. During specialization, each of these specialized cells becomes specialized for its specific function. For example, skin cells specialize to form keratinocytes, which form the outer layer of our skin. Neurons specialize to make connections with other neurons in the brain. Blood cells specialize to carry oxygen throughout the body.
The process of differentiation and specialization is continuous, as new cells are constantly being created and old ones are constantly dying off. This continuous process of change is what allows the body to grow and develop throughout life.
Explanation:
My own original work.
Science uses data to describe the findings of an experiment, qualitative data is: set of data describing the findings of an experiment.
Qualitative data is data that describes, analyzes, decodes, translates, and synthesizes the results of events that occur more or less naturally.
It tries to achieve a holistic description, that is, it tries to exhaustively analyze, in great detail, the findings of an experiment.
It contains the narrative records of the findings of an experiment studied through techniques such as participant observation and unstructured interviews.
That is, the analysis of qualitative data is mainly one of synthesis and integration of the information obtained from various instruments and means of observation.
That is,a coherent descriptive analysis that aims to achieve a thorough and detailed interpretation of the research problem will predominate.
Therefore, we can conclude that qualitative data is the set of data describing the findings of an experiment.
Learn more here: brainly.com/question/24934746
<u>It is D. 3.5 billion years. </u>The "stromatolites" are the earliest fossils that have been found.
