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4 years ago

How do leaves form? How are they attached to the plant?

1 answer:

8 0

Xylem: cells that bring water and minerals from the roots into the leaf. Phloem: cells that usually move sap, with dissolved sucrose(glucose to sucrose) produced by photosynthesis in the leaf, out of the leaf. A sheath of ground tissue made of lignin surrounding the vascular tissue. thats how leaves are made

Some leaves have a petiole, which attaches the leaf to the stem; leaves that do not have petioles are directly attached to the plant stem and are called sessile leaves. ... In an opposite leaf arrangement, two leaves connect at a node. In a whorled arrangement, three or more leaves connect at a node. thats how they r attach

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Suppose, in an effort to prevent the population from declining, Italy begins offering new mothers extended periods of paid fam

Debora [2.8K]

Answer: D. economic incentives

Explanation:

Economic incentive refers to the kind of motivation strategy in which the person is provided with financial assistance and fulfill other kind of preferences according to needs, desire and wants of the person in return receiving the required task to be done or for achieving a social goal.

The given situation is an example of economic incentive this is because of the fact that mothers are provided with the paid family leave from work this is helpful in increasing the birth rate of woman. This is in effort for preventing a declining population.

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3 years ago

How many amino acids can a sequence of 24 DNA bases code for?

timurjin [86]

The answer your looking for is 20 Amino Acids.

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4 years ago

Two genes determining a trait In primroses, the dominant allele of gene K is necessary to synthesize blue flower pigment. Blue p

GREYUIT [131]

Answer:

The ratio of blue to white offspring in the progeny is 4 blue : 12 white.

Explanation:

Available data:

The dominant allele K is necessary to synthesize blue flower pigment
K is inhibited by the dominant allele D

Plants with the genotype K- D- will not produce pigment (and their flowers will be white)

Cross: testcross for (Kk Dd) plants

Parental) KkDd x kkdd

Gametes) KD kD Kd kd

kd kd kd kd

Punnet square) KD Kd kD kd

kd KkDd Kkdd kkDd kkdd

Whenever D is present, it inhibits the expression of the K gene, so every plant with the dominant D allele will be white. This plants´ genotype is kkD- or K-D-.

Whenever D is absent and K is present, every plant with genotype K-dd will be blue.

The recessive form for K and D genes will express white-flowered plants, with genotype ddkk

F1) Progeny genotype: 4/16 KkDd, white-flowered plants

4/16 Kkdd, blue-flowered plants

4/16 kkDd, white-flowered plants

4/16 kkdd, white-flowered plants

The ratio of blue to white offspring in the progeny is 4 blue : 12 white.

Blue-flowered plants: 4 Kkdd

White-flowered plants: 4 KkDd + 4 kkDd + 4 kkdd

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4 years ago

What are the main functions of polysaccarides in plants?

scoundrel [369]

Explanation:The main functions of polysaccharides in plants are the protection and energy. If you look carefully, plant cell walls are made up of cellulose and hemicellulose. These two are the major plant polysaccharides that provide rigidity and physical strength the cell wall and the whole plant. :)

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3 years ago

Read 2 more answers

Name the enzyme that catalyzes the reaction that converts fibrinogen to fibrin.

IceJOKER [234]

The enzyme name that catalyzes the reaction that converts fibrinogen to fibrin is Thrombin. The thrombin is an enzyme - type peptidases. It is not part of the blood, but is formed as part of the blood clotting process.

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4 years ago