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Fynjy0 [20]
3 years ago
15

Researchers recently discovered an exquisite fossil of a fern (land plant) in sweden. the plant was preserved instantaneously wh

en buried in a lava flow. under a microscope, scientists can see nuclei, some in different stages of cell division, along with some individual chromosomes. this fossil fern was found in a layer along with dinosaur fossils. how old could this fossil be, based upon this information and dates of events in the history of life
Biology
2 answers:
elena-s [515]3 years ago
6 0
This fossil must be younger than 475 million years old, because that is when land plants arose
Lostsunrise [7]3 years ago
4 0

Answer:

The fern may be 650 million years

Explanation:

Fossilization of organisms and plants took place many years ago. Fossils are remains of plants, animals, fungi, bacteria, and single celled living things that have been replaced by rock material or impressions of organisms preserved in the rocks. This happened when there was an anaerobic decomposition of burried dead organisms and plants that contained energy derived from photosynthesis. The organisms fossilized and became preserved in rocks.  

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How do cells release the energy from glucose?
Bess [88]

Photosynthesis, the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.

8 0
2 years ago
Animal behavior researchers often refer to an activity associated with punishment or reward as a(n)
MrMuchimi

Answer:

It is an operant.

Explanation:

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8 0
3 years ago
Read 2 more answers
An allele is: A. the particular combination of genes for a given trait in a given organism. B. one of several forms of a gene. C
irinina [24]

Answer:

B

Explanation:

According to Mendel, an organism receives two forms of a gene from each parent. This form received by each parent is called an ALLELE. An allele is the variant form of a gene for a particular trait.

For a diploid organism, two copies of genes (alleles) are acquired by an organism. The combination of these alleles from each parent determines the genotype for that gene.

In Mendel's experiments, he discovered that one allele can mask the expression of another for a trait. He called the allele that masks DOMINANT allele while the allele that is masked RECESSIVE allele. The combination of these alleles, whether two dominant or two recessive called HOMOZYGOUS or one dominant and one recessive called HETEROZYGOUS, determines the phenotype of the organism for that gene.

N.B: There are exceptions to this pattern of inheritance.

5 0
2 years ago
In which location in the human body will the catalase reaction be predicted to be slowest? F.) Brain G.) Heart H.) Liver J.) Sto
natali 33 [55]

Answer:

brain

Explanation:

I am sorry if this wrong

8 0
3 years ago
A mugger steals your wallet causing all of the following to happen EXCEPT ________.a.) increased metabolic rateb.) increased rat
Lapatulllka [165]

Answer:

c.) increased glucose uptake to the liver from blood

Explanation:

During stressful conditions such as facing a mugger, the sympathetic system of the autonomic nervous system is activated. There is a release of stress hormones from the adrenal glands to produce the flight or fight response. One of the physiological events occurring during these conditions is the breakdown of glycogen into glucose in liver cells and the release of glucose into the blood. The release of glucose by the liver increases blood glucose levels. This is done to ensure glucose availability as fuel. There is no uptake of glucose from the liver cells under such emergency conditions.

8 0
3 years ago
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