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Related Questions
2. Sperm and egg combine in ______________ to produce a zygote with the normal number of chromosomes.
1. What purpose does the regulatory portion of the gene have? 2. In this simulation, the DNA molecule’s different strands are represented as different colors one blue and one red. What is the significance of the two different strands? Are they both used in transcription? 3. There are two required components to initiate transcription on the gene. What are they, and where do they bind on the DNA strand? 4. How would you know if transcription has been successful? 5. How do negative transcription factors impact transcription? 6.Explain the difference in transcription between Gene 1 and Gene 2. Hypothesize the reason for the difference.
Explain Okazaki fragments as applied in DNA replication
Match each type of cell junction with its description.Tight junctions*prevent liquid from seeping between cellsDesmosomes*act as rivets to hold adjacent cells together when epithelial tissue movesGap junctions*allow movement of cytosol, ions, and small molecules between animal cellsPlasmodesmata*openings through the cell walls of plant cells that allow adjacent cells to share materials
B. Bacteria
C. Eukarya
D. Archaea
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It would be "C.Eukarya" (I don't speak English, I hope it's okay)
was added to 9.9 ml of sterile buffer. After thorough mixing, this
suspension was further diluted by a 1/100 dilution followed by a
1/10 dilution. One-tenth of a ml of this final dilution was plated
on agar plates. After incubation, 52 colonies were present. How
many colony-forming units were present in the total 10 gram sample
of hamburger?
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Answer:
5.2 × 10 ⁹ cfus
Explanation:
Using the dilution factors
0.1 ml of the final dilution has 52 colonies
1 ml will have approximately 520 colonies
10 ml of the final sample will have 5200 colonies
at 1 / 100 dilution
1 ml of the sample will have 5200 colonies
100 ml of the sample will have 520000 colonies
1 ml of the 0.1 ml + 9.9 ml has 520000 colonies
10 ml will have 5200000
at the second stage of the dilution
0.1 ml of the slurry had 5200000 colonies
1 ml will have 52000000 colonies
10 ml will have 520000000 colonies
100 ml of the initial sample ( 10 grams + 90 ml ) = 5200000000 colonies =
5.2 × 10 ⁹ cfu
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Answer:
Recycled, not recycled
Explanation:
In a soil ecosystem, matter is recycled and energy isn't recycled.
Matter is recycled through biogeochemical cycles. Matter has to be recycled because it can neither be created, nor destroyed, and as such, recycling is the only option left.
Energy isn't recycled because most of the energy gotten is used by organisms, as gotten from the plants already, and thus, when it gets to the food chain there isn't much left to be recycled.
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The answer is stratus cloud, a blanket in the sky meaning bad weather mostly rain :)
Answer:
The answer is stratus cloud, a blanket in the sky meaning bad weather mostly rain
Explanation:
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Contrarily, Ectotherms' body temperature primarily depends on external heat sources. That is, ectotherm body temperature rises and falls along with the temperature of the surrounding environment. So if it is hot outside their body temperature rises as well.
Answer:
sample response: Endotherms are able to maintain a constant body temperature. An endotherm may respond to a hot summer day by sweating or panting. The body temperature of an ectotherm, on the other hand, changes with its surroundings. In order to stay cool, an ectotherm must move somewhere cooler like the shade of a plant or rock or seek cool water to lay in
Explanation:
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Answer:
False, it is only represented by one class: Crinoidea (sea lilies).
Explanation:
Echinoderms (phylum Echinodermata) are marine organisms that comprises more than 6,000 species. These animals are deuterostomes that are differentiated to have an ambulacral vascular system and a pentameric symmetry. Echinoderms are divided in the following classes: 1- Ophiuroidea (snake stars), 2-Asteroidea (sea stars), 3-Crinoidea (sea lilies), 4-Holothuroidea (sea cucumbers) and 5-Echinoidea (sea urchins), which can be easily distinguished by anatomical and ecological characteristics.