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Eddi Din [679]
2 years ago
15

A substance or molecule that participates in a chemical reaction is called

Biology
1 answer:
puteri [66]2 years ago
3 0

In a chemical reaction, the substances that undergo change are called reactants

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The primary electron acceptor in photosystem II is __________. Group of answer choices P700 P700 P680 P680
sesenic [268]

Answer:

680

Explanation:

When the P680 special pair of photosystem II absorbs energy, it enters an excited (high-energy) state. Excited P680 is a good electron donor and can transfer its excited electron to the primary electron acceptor, pheophytin.

7 0
2 years ago
What modern day practice helps prevent an inadequate production of thyroid hormones?
Mama L [17]

Iodized salts helps to prevent an inadequate production of thyroid hormones .

<h3>What is iodized salts ?</h3>

Iodized salt is a table salt . it is a mixture of very little amount of sodium iodide and potassium iodide .

It helps to prevent iodine deficiency .

It is a micronutrient and dietary mineral that is naturally present in the food supply .and also it is a heavy element .generally found near sea coasts .

Iodine deficiency disease includes hypothyroidism .

<h3>What is hypothyroidism ?</h3>

It occurs due to less secretion of thyroid hormone caused by iodine deficiency .it causes stunted growth . it shows low rate of metabolism .

Hypothyroidism includes diseases like myxoedema or gull's disease , cretinism .

Inadequate supply of iodine in diet causes enlargement of the gland known as simple goitre.

<h3>Thyroid hormones :</h3>

It is secreted by endocrine glands known as thyroid gland . it includes two types of hormones known as thyroxine and calcitonin .

Thyroxine is an iodine containing hormone known as tetra-iodothyroxine(80%) and tri-iodothyroxine (20%).

calcitonin is secreted from thyroid gland and is polypeptide hormone .

Learn more about thyroid hormones here:

brainly.com/question/9251938

#SPJ4

4 0
1 year ago
Larry's science teacher mentioned protozoans in one of their classes. She said that protozoans are organisms that consume other
yKpoI14uk [10]
In this case, the protozoa will be in category B - animal-like protist.

Animals consume other living organisms to obtain energy. Archaea and bacteria are a high level classification of different kinds of microorganisms that include many different subtypes. So these are not appropriate answers as they are not specific enough. Plant-like protists can photosynthesize which these protozoans cannot. Fungus does have similarities with animals in that it consumes living tissue to survive, however animal-like protist is the best fit for this questions.
4 0
3 years ago
Read 2 more answers
Which marks the beginning of the fall season
Ulleksa [173]

Answer:

Explanation:

Based on the astronomical definition of seasons, yes, the autumnal equinox does mark the first day of fall (in the Northern Hemisphere). However, according to the meteorological definition of seasons, which is based on temperature cycles and the Gregorian calendar, the first day of fall is September 1.

stole this from g**gle, but it explains it farily well. Autumnal equinox is the turning point

8 0
3 years ago
joost, s. et al. single-cell transcriptomics reveals that differentiation and spatial signatures shape epidermal and hair follic
DerKrebs [107]

A single cell RNA seq analysis identifies 25 population of epidermal cells . 

<h3>What is single cell transcriptomics used for?</h3>

Single cell transcriptomics are being used to create reference maps of healthy human tissues, organs and systems at single cell resolution.

An essential model system for studying stem cells and tissue regeneration is the mouse epidermis with its hair follicles. To demonstrate how the cellular heterogeneity of the murine telogen epidermis is controlled at the transcriptional level, we used single-cell RNA-sequencing in this study. 25 different populations of interfollicular and follicular epidermal cells were identified by impartial clustering of 1,422 single-cell transcriptomes. With previously unheard-of resolution, our data allowed for the reconstruction of gene expression patterns during epidermal development and along the proximal-distal axis of the hair follicle.

To Learn more about Transcriptomics refer

brainly.com/question/14783864?referrer=searchResults

#SPJ4

4 0
1 year ago
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