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3 years ago

What is the basic life cycle of a plant?

Biology

2 answers:

lukranit [14]3 years ago

7 0

The plant life cycle begins with a seed. the seed will sprout and produce a tiny immature plant called a seeding. The seeding will grow to adulthood and form a mature plant, the mature plant will reproduce by forming new seeds which will begin the next life cycle.

brilliants [131]3 years ago

4 0

Here is a picture of the basic life cycle of a plant.

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The LMand LNalleles at the MN blood-group locus exhibit codominance. Give the expected genotypes and phenotypes and their ratios

Dmitry [639]

Answer:

Please find the expected genotypes and phenotypes of the progenies of each cross below.

Explanation:

In the MN blood-group locus of the gene, alleles LM and LN exhibit codominance i.e one allele is not dominant or recessive to the other, hence, they are both expressed when they occur in a heterozygous state (MN).

Considering the following crosses (find the punnet square attached);

a)LMLM x LMLN - The progeny are LMLM and LMLN in the genotypic ratio 1:1. Phenotypic ratio is Blood type M (1) : blood type MN (1)

b) LNLN x LNLN - The progeny are all LNLN offsprings with a phenotypic and genotypic ratio 4:0. All offsprings will have a blood type N (4)

c) LMLN x LMLN - The progenies are LMLM, LMLN and LNLN in the genotypic ratio 1:2:1 respectively. The phenotypic ratio is Blood type M (1) : L

Blood type MN (2) : Blood type N (1)

d) LMLN x LNLN - The progeny are LMLN and LNLN with genotypic ratio 1:1 and phenotypic ratio blood type MN (1) : blood type N (1)

e) LMLM x LNLN - The progeny are all LMLN offsprings with penotypic ratio blood type MN (4)

6 0

3 years ago

A marked decrease in brain processing and memory in some older adults is MOST likely caused by: A. inadequate control processes.

Andru [333]

Answer:

Option-B

Explanation:

The brain is an organ composed of neurons which controls all the voluntary and involuntary of animals. In humans, the brain is located in the skull where the brain is suspended in a fluid called cerebrospinal fluid.

As humans ages and becomes old aged, the neurons in the brain losing their ability to perform their function, if they are lost they cannot be regenerated.

The lesions appear on the white matter of the brain and the brain shrink. Due to these known and other unknown features, the process controlled by these neurons become inadequate and shows slower brain processing and weak memory.

Thus, Option-B is the correct answer.

6 0

2 years ago

Which feature is characteristic of healthy coral reefs?

Greeley [361]

The answer is A because they need the sunlight to go through the water

8 0

3 years ago

Read 2 more answers

In the Kirby-Bauer disk diffusion test, the _______ of the zone of inhibition is measured and used for interpretation.

snow_tiger [21]

Answer:

The correct option is : a. diameter

Explanation:

The Kirby–Bauer test or the disk diffusion test, is a method to determine the antibiotic sensitivity of the given bacteria. This test involves the use of antibiotic discs to determine the effect of antibiotics on the bacteria.

In this test, the wafers having antibiotics and the bacteria are placed on the agar plate and incubated. If the antibiotics present stops the growth of the bacteria, there will be an area around wafer with no bacterial growth, such an area is known as the zone of inhibition.

The diameter of this zone of inhibition is measured to determine the antibiotic sensitivity of the given bacteria.

7 0

2 years ago

Which liver function study is used to show the size of the liver and hepatic blood flow and obstruction?

joja [24]

Answer:Radioisotope Liver Scanner.

Explanation:

Radioisotope liver scan is a type of nuclear medication in which the radioactive tracer is formed by adding radioactive atoms to the molecules absorbed by the normal liver tissues.

It is used in diagnosing liver diseases.

4 0

2 years ago