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3 years ago

Describe the process that results in the formation of a tetrad.

Biology

1 answer:

goldenfox [79]3 years ago

8 0

Answer:

A tetrad is a four part structure formed during the prophase I of meiosis I which is formed by the homologous chromosomes which is composed of two identical chromatids.

The tetrad formation takes place when a proteinaceous meiosis-specific nuclear structures called synaptonemal complex is formed between two homologous chromosomes which mediates the tight associations of the homologous chromosomes.

The synaptonemal complex consists of two ladder like lateral elements which attaches the chromatin of the homologius chromosomes. The central region of the synaptonemal complex is composed of the transverse filaments and the central element which bridge the space between the the lateral elements.

This attachment of the chromatin to the synaptonemal complex mediates the chromosome pairing and form tetrad.

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What happens to crude birth rates when literacy rates go up

Novosadov [1.4K]

Answer:

When literacy rates goes up then crude birth rates will automatically be decline

Explanation:

Crude birth rate refers to the number of births /1000 in a population. It doesn’t count the age and sex in a population.

General fertility corresponds to number birth of a women age between 15- 49 in a year.

Factors Affecting fertility Rates: Healthcare,Education

Healthcare: Improvement in healthcare leads to drop infant mortality rate , knowledge of birth control measures and economic status have an impact on birth rates.

Education: Female literacy rate and knowledge of birth control and employment opportunities also decline crude birth rate.

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3 years ago

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Some bacteria viruses parasites and fungi can cause an illness. these are known as?

yawa3891 [41]

Infectious diseases are disorders caused by organisms — such as bacteria, viruses, fungi or parasites.

<h3>What are viruses bacteria and parasites?</h3>

Viruses, bacteria, and parasites live organisms that are found all around us. they're in water and soil. they're on the surfaces of foods that we eat. they're also on surfaces that we touch, like Counter top in the bathroom or kitchen. Some bacteria sleep in and on our bodies and don't cause problems.

<h3>Which are infectious diseases?</h3>

The flu, measles, HIV, streptococcal sore throat , COVID-19 and salmonella are all samples of infectious diseases. Cancer, diabetes, congestive coronary failure and Alzheimer's disease are all examples of noninfectious diseases.

What are the causes of disease?

Similarly, diseases are caused by different microorganisms and may be classified as diseases caused by bacteria, fungi, viruses etc. Some diseases also are caused by multicellular organisms such as worms.

Learn more about infectious diseases :

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5 0

2 years ago

DaniilM [7]

Answer:The anesthesia has blocked the Inter-neurons from carrying signals to the brain.

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3 years ago

kakasveta [241]

<span>Similarities</span> between Gymnospermes and Angiospermes:

<span>· </span>Having seed-Gymnospermes and Angiospermes are types of plants bear seeds. They belong to a single class known as Spermatophyta. Spermatophyta or seed plants are those <span>plants that produce seeds.</span>

<span>· </span>Diferentiation- The sporophyte (diploid multicellular stage in the life cycle of a plant) of both,<span> Gymnospermes and Angiospermes,</span> is differentiated into root, stem, and leaves.

Differences between Gymnospermes and Angiospermes:

<span>· </span>Seed-Although both have seeds, differences between them are huge. Gymnospermes have bare, non-encased seeds. The term "gymnosperm" in Greek means "naked seeds". On the other hand, seeds of Angiospermes are enclosed within an ovary, usually in a fruit.

<span>· </span>Pollination- In Gymnospermes, the pollination is by wind, unlike most Angiosperms, who use insects, mammals or birds. Gymnosperm flowers are often difficult to spot because they are not out to attract flying pollinators.

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3 years ago

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What is the purpose of a data table?

Natalka [10]

C is your answer
The table keeps track of all your data

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3 years ago

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