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3 years ago

The kind of life cycle seen in flowering plants is:

1 answer:

5 0

Gametes develop in the multicellular haploid gametophyte (from the Greek phyton, “plant”). Fertilization gives rise to a multicellular diploid sporophyte, which produces haploid spores via meiosis. This type of life cycle is called a haplodiplontic life cycle

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Scientists hypothesize that vesicles evolved to become cells due to the presence of self-replicating molecules, such as DNA and

S_A_V [24]

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.

Below are the choices that can be found from other sources:

A.) DNA can store genetic information and most likely appeared before RNA.

B.) DNA is more linear than RNA and most likely appeared before RNA.

C.) RNA can catalyze biological reactions and most likely appeared before DNA.

D.) RNA is more stable than DNA and most likely appeared before DNA.

i think the answer is A.

8 0

3 years ago

Humans autosomal cells have two copies each of 23 unique chromosomes. Match each of the following cell division events and cell

zvonat [6]

Answer:

Please see below

Explanation:

The number of chromatids have been stated with the respective event when it occurs in that particular number in the following way:

23 chromatids

primary oocyte arrested prior to ovulation

spermatozoa

46 chromatids

oogonium prior to S phase

92 chromatids

secondary polar body

7 0

2 years ago

Achondroplasia is an autosomal dominant genetic disorder in humans. If a man with Achondroplasia ( heterozygous) and a normal wo

tresset_1 [31]

Answer and Explanation:

Achondroplasia is a form of dwarfism that affects the formation of cartilage; early in development, most of the skeleton is comprised of cartilage. Cartilage is a type of flexible, tough tissue; in achondroplasia ossification (conversion of cartilage to bone) is affected. Symptoms include an enlarged head, shorter upper and lower limbs, and limited motion at the elbow.

Punnett squares are illustrations that display the product of hybrid trait crosses by genetic breeding.

For this cross...

Assuming Achondroplasia= dominant

Parent generation or P generation:

gametes: An → Achondroplasia dominant (A), No Achondroplasia recessive (n)

Heterozygousity describes the allelic makeup; these traits comprise two varying forms of a gene. However, homozygous traits comprise identical forms of the gene.

Male: An → with Achondroplasia

Female: nn → without Achondroplasia

genotypes and phenotypes for parent and offspring...

Assuming heterozygousity of the male , for the cross

P generation: An × nn

Achondroplasia × No Achondroplasia

F1 generation:

genotype: An × nn ...(from punnet square)

phenotype: 2 with Achondroplasia ; 2 without

∴ 50% are genotypically heterozygous while 50% is homozygous , 2 with Achondroplasia ; 2 without

8 0

3 years ago

An older adult client has a decubitus ulcer with drainage, dysphagia, and immobility. She consumes less than 300 calories per da

garri49 [273]

Answer:

Negative nitrogen balance

Explanation:

Based on the information provided within the question it can be said that in this scenario it is clear that the client is in a state of Negative nitrogen balance. This means that the individual is excreting more nitrogen than what the amount of nitrogen that the body is ingesting. This happens in many scenarios such as serious tissue injuries, fevers, hyperthyroidism, decubitus ulcer with drainage, etc.

6 0

3 years ago

Which of the cell junctions is involved in creating a barrier between cells?

aleksklad [387]

Tight junctions are cell junctions that seal tissues. These junctions form protective and functional barriers.

The cell junction that is involved in creating a barrier between cells is the TIGHT junction.

The tight junctions are cell-cell adhesion structures implicated in cell polarity and signaling.

On the other hand, adherens junctions are cell junctions required for maintaining contact inhibition.

Finally, desmosomes are intercellular junctions that bind intermediate filaments of the cytoskeleton with cadherin proteins.

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6 0

3 years ago