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trasher [3.6K]
3 years ago
7

A student uses a microscope to observe cells in the root tissue of an onion. He

Biology
1 answer:
Hunter-Best [27]3 years ago
3 0

Answer: The root tissue cells all have the same number of chromosomes. :)

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Another name for a fertilized egg is a(n) (2 points) zygote. gamete. ova. fetus.
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It's called a zygote
8 0
3 years ago
1. Forensic scientists use DNA fingerprinting for
Galina-37 [17]

Answer:

When used for forensic science, DNA fingerprinting makes use of probes that target regions of DNA specific to humans, thus eliminating any possibility of contamination by extraneous DNA from bacteria, plants, insects, or other sources.

Explanation:

Answered that question before. hope this helps :)

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You discover a genus of lizards that contains two extinct species and five living species. The oldest fossils from the genus bel
Crank

Answer:

The evolution of the species might occur due to the change in the environmental conditions and the mutation in the organisms. The organism that can adapt in the environment will survive better.

The lizard species is present in the Ethiopian biogeographical region but now its two living species is in Neotropical biogeographic region and three species is in Australian biogeographic region. This might possible due to the fact that Neotropical and Australian lineages might have the common ancestor that were earlier originated in the Ethiopian region. The continental drift might have occur that breaks the Ethiopian biogeographical region and the species are present in the different island.

6 0
3 years ago
Which statements about human sperm cells are true? choose all that apply
Serhud [2]

Answer:

The answer is B and D which they have 23 chromosomes

Explanation:

8 0
3 years ago
The bacterium known for causing pseudomembranous colitis, a potentially deadly superinfection, is ________.
jenyasd209 [6]

Answer:

<em>Clostridium difficile </em>

Explanation:

<em>Clostridium difficile </em>are anaerobic gram-positive rod-shaped bacteria. This species of <em>Clostridium</em> has an incubation period of days to weeks and causes severe diarrhea and fever. It causes antibiotics related colitis termed as pseudomembranous colitis. The epithelial lining of colon undergoes necrosis due to the bacterial toxins. The affected individuals exhibit abrupt diarrhea, presence of blood and toxins in stool.

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4 years ago
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