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3 years ago

Gymnosperms and angiosperms, which are seed plants, alternate between ( 2 ) generations.

Biology

1 answer:

mr Goodwill [35]3 years ago

4 0

Answer:

I've corrected the relevant part in the false statement to make it true. Please see below:

Gymnosperms and angiosperms, which are seed plants, alternate between (2) generations.

The statement is true. It alternates between haploid and diploid stages.

Gymnosperms are non-flowering plants with EXPOSED SEEDS and angiosperms are flowering plants with PROTECTED SEEDS.

This statement is also true. The egg is fertilized inside of the flower.

Sporophytes produce spores for reproduction. In seed plants, the male reproductive structure produces MICROSPORES and the female reproductive structure produces MEGASPORES.

The statement is correct. The male gametophyte will fertilize the female gametophyte, known as the egg, to produce a zygote.

Gametophytes produce GAMETES through the process of MITOSIS.

False. The process of meiosis results in gametes, and not mitosis.

Hope that answers the question, have a great day!

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What molecule is represented by the molecular model shown below?

ladessa [460]

Apparently it is ATP as deduced from the last line of text and no model to refer to.

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3 years ago

Which of the following information could be included in the description of a grasshopper’s niche, but not in a description of it

Ivan

The niche of grasshopper would include the plant species it eats.

Explanation:

The niche of an organism is different to that of a habitat. A niche includes the interaction between organisms and the food that they eat, whereas, a habitat is a place where organisms are provided with food, protection and shelter.

Habitat is a place of ecosystem that involves other environmental factors like- rain, sunlight, humidity etc. So, food type eaten by grasshopper would be the description of a niche and not a habitat.

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3 years ago

Briefly explain how x-rays, CT/CAT scans, ultrasounds, and MRI are used to diagnose diseases.

LUCKY_DIMON [66]

Answer:

These techniques include x-rays, computed tomography (CT) scans, and magnetic resonance imaging (MRI). These imaging tools let your doctor "see" inside your body to get a "picture" of your bones, organs, muscles, tendons, nerves, and cartilage. This is a way the doctor can determine if there are any abnormalities.

Explanation:

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3 years ago

The student who caught the cold caused by this specific Rhinovirus was exposed to the exact same Rhinovirus 18 months later. Wha

Ilya [14]

The student who caught the cold caused by this specific Rhinovirus was exposed to the exact same Rhinovirus 18 months later. Memory B cells of the immune system will protect her from getting the same cold again.

In immunology, a memory B cell (MBC) is a type of B lymphocyte that forms part of the adaptive immune system. These cells develop within germinal centres of the secondary lymphoid organs.

Memory B cells circulate in the blood stream in a quiescent state, sometimes for decades. Their function is to memorize the characteristics of the antigen that activated their parent B cell during initial infection such that if the memory B cell later encounters the same antigen, it triggers an accelerated and robust secondary immune response.

Memory B cells have B cell receptors (BCRs) on their cell membrane, identical to the one on their parent cell, that allow them to recognize antigen and mount a specific antibody response.

Learn more about memory B cell here : brainly.com/question/23423029

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2 years ago

In eukaryotic cells, the message from the DNA must be removed from the nucleus before it can be read and used to make proteins.

Veronika [31]

Answer:

Protein production in prokaryotes begins even before the completion of transcription. This means that ribosomes attach to the mRNA being generated even before transcription process is terminated. Therefore translation occurs in concurrence with transcription. This is because there is no definitive boundary between the nucleoid and cytoplasm.

In eukaryotic cells, the nucleus is separated from the cytoplasm by the nuclear membrane. This means transcription has to complete before the translation of proteins occurs. This is because the ribosomes are located in the cytoplasm while the DNA is in the nucleus.

This difference is part of the reason prokaryotic cells are able to respond really fast to an environmental stimuli as compared to eukaryotes. Remember in addition mRNA in prokaryotes do not need splicing (as required in eukaryotes) adding to quick protein production.

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3 years ago