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Lera25 [3.4K]
2 years ago
9

Question 21(Multiple Choice Worth 4 pollies)

Biology
2 answers:
slava [35]2 years ago
8 0

Answer:

I don't unerstand the question

Explanation:

I think it's B

butalik [34]2 years ago
8 0

Answer:

Tidal power and current power

Explanation:

First, we can determine that A and B are obvoiusly wrong. Ocean thermal energy produces zero carbon emissions, as most forms of hydroelectric power do. Secondly, wave energy might affect aquatic life, but it wouldn't affect the migration of birds. After reviewing the 3rd and 4th answers, they do look reasonable. Therefore, your answer is tidal power and current power.

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Which is a correct statement about the relationship between the immune system and other systems?
larisa [96]

Answer:

The immune, lymphatic, and circulatory systems work together in protecting the body.

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3 years ago
Suppose you have identified a type of lizard that seems to have acquired a mutation in which hindlimbs are absent. Which gene, a
slavikrds [6]

Answer:

Sonic Hedgehog.

Explanation:

Sonic hedgehog is a secreted protein that in humans is encoded by the SHH gene. It is the best studied ligand of the hedgehog signaling pathway, others being desert hedgehog (DHH) and Indian hedgehog (IHH). It plays a key role in the development of animals, from insects to mammals. In vertebrates, it is involved in organogenesis, including the growth of digits on limbs and the organization of the brain.

Sonic hedgehog has also been shown to act as an axonal guidance cue. It has been demonstrated that SHH attracts commissural axons at the ventral midline of the developing spinal cord. Specifically, SHH attracts retinal ganglion cell (RGC) axons at low concentrations and repels them at higher concentrations

7 0
3 years ago
Which of the following abiotic factors might have an effect on how much photosynthesis can occur by the producers in an ecosyste
Evgesh-ka [11]

Abiotic factors such as temperature, water quality, air quality, soil quality, and sunlight efficiency affect the rate of photosynthesis. Thus, the correct option is D, i.e. All of the above can affect photosynthesis.

<h3>What is Photosynthesis?</h3>

Photosynthesis may be defined as a process through which green plants synthesized their own food (glucose) via carbon dioxide and water in the presence of sunlight.

The rate of photosynthesis primarily depends on the numerous abiotic factors which are present in a particular environment.

For example, Desert plants accomplish photosynthesis by the CAM pathway, which requires less water as compared to rainforest plants.

The maximum rate of photosynthesis occurs in the region of photosynthetically active radiation (PAR), which belongs to the wavelength of 400nm-700nm.

Therefore, it is well described above.

To learn more about Photosynthesis, refer to the link:

brainly.com/question/19160081

#SPJ1

6 0
2 years ago
WILL GIVE A BRAINLEST
babymother [125]
The answer is nucleus
7 0
3 years ago
How does the number of valence electrons in atoms of metalloids explain why metalloids are semiconductors?
lukranit [14]

Answer:They have three to six valence electrons, so they can lose or gain electrons. on edgenity.

Explanation:

7 0
3 years ago
Read 2 more answers
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