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Answers on questions: Biology
- B Biology When estuarine water forms layers of different density that do not mix, it is called what?...
- B Biology Gene expression—translation how do cells synthesize polypeptides and convert them to functional proteins?...
- B Biology Aplant has a unique photosynthetic pigment. the leaves of this plant appear to be reddish yellow. what wavelengths of visible light are being absorbed by this pigment?...
- B Biology Describe the activity of chromosomes in metaphase 1 of meiosis how does this activity differ from the activity...
- B Biology Discuss how a specific genetically modified organism might provide a benefit for humans and at the same time pose a threat to a population or ecosystem....
- B Biology What can track storms in different altitudes?...
- B Biology Light bending as it passes through a rain drop is an example question 11 options: a.refraction b.transmission c.reflection d.diffraction question 12 (1 point) question 12 unsaved...
- B Biology List the steps of preparation of temporary mount of a leaf peel to observe stomata....
- B Biology How many possible genetic combinations can arise from meiosis?...
- B Biology We experience hunger when the level of a. ghrelin in our blood is low. b. leptin in our blood is low. c. glucose in our blood is low. d. pyy in our blood is high....
Ответ:
A
Explanation:
as water heats the particles move faster and expand the opposite for cold
Ответ:
1. The right answer is b) chemoautotrophs
Chemotropic bacteria are unicellular (essentially prokaryotic) organisms that use the energy of the oxidation of chemical compounds as the initial source of chemical energy. They are distinguished from phototrophic bacteria.
These bacteria use chemical compounds, by oxidation-reduction to develop their own organic constituents. Depending on the nature of the compound used, mineral or organic, there are two main types:
* chemo-lithotrophic bacteria use mineral compounds
* Chemo-organotrophic bacteria use organic compounds. They constitute the vast majority of chemotropic eubacteria.
2. The right answer is a) they should use antibotics only when nessary
Antibiotic resistance is today one of the most serious threats to global health, food security and development. It can affect anyone.
Antibiotic resistance is a natural phenomenon but the misuse of these drugs in humans and animals speeds up the process.
3. The right answer is b) conserve water
The hydric state of the plant, which may be characteristic of the water content or leaf tissue potential, influences a number of physiological processes:
* Cell growth can only be assured if the water potential is greater than a critical water potential
* The mechanisms of opening and closing stomatal are directly related to the water content in the plant, precisely to turgor stomatal cells.
4. The right answer is c) lyse the host cell right away
The lysogenic pathway is intimately conditioned by the integration of the viral genome with that of the host cell. This viral sequence mixed with the host genome is called a provirus (or prophage for bacteria).
Although the integration of the viral genome with that of the host is performed, the host cell does not enter the lytic cycle. She continues to live and multiply, so the provirus is passed on to the next generation during cell divisions. It is lysogeny.
5. The right answer is d) dry areas on land
Depending on the groups and species, the algae are able to colonize almost any environment. They meet almost pure waters with waters overloaded with minerals, thermal waters with glaciers, acidic waters with alkaline waters, as well as in the humid terrestrial environment, but not in dry and arid environments.
6. The right answer is d) a triploid cell
Fertilization in angiosperms is twofold: the male gametes transported by the pollen grain will fuse their nuclei (caryomixis) with those of two different cells. A first caryomixis between male gamete and oosphere will give the embryo, another between the second male gamete and the central nuclei of the ovum will lead to a triploid cell which will form the albumen of the seed.
7. The right answer is d) grow close to the ground
Bryophytes, or mosses, are a branch of the plant kingdom. The plants of this branch are terrestrial plants characterized by the absence of vascular system.
They do not have roots, but structures called rhizoids that only serve to adhere to the substrate. Rhizoids can also absorb water, but the entire bryophyte apparatus is capable of doing so.