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vitfil [10]
3 years ago
7

Explain various part of a leaf with well diagram​

Biology
1 answer:
Oksana_A [137]3 years ago
5 0

Answer:

A leaf has two main parts: (1) Petiole- the stalk that supports a leaf in a plant and attaches the leaf blade to the stem. (2) Lamina- the green flat part of a leaf that is specialized for photosynthesis. ... (ii) Midrib- The central, thick, linear vein that runs along the length of a leaf is called midrib

#indians

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In 1936 J.W. McKay crossed a stock melon plant that produced tan seeds with a plant that
patriot [66]

Answer:

Explanation:

Lets Tan seed be TT

Red seed be tt

A cross between TT ×tt will produce 4 Tt

TT× tt

!

F1 Tt Tt Tt Tt

a. Tan seed is dominant with an allele TT. It effect dominate that of red seed indicating it is a dominant traits while red seed is a recessive traits.

A dominant trait is a traits that is expressed in the phenotype of an organism the F1 generation are all Tan seeds this shows that the trait is dominant.

The genotype of the F1 melon is Tt in a dominant form

The F2 result follows the mendelian principle where segregation occur leading to a phenotypic ratio of 3:1

72Tan seeds:24red seeds

Where the 72 tan seed has the highest ratio and 24 red seeds has the smaller ratio.

Tt ×Tt

!

F2 TT Tt Tt tt

Phenotypic ratio 3:1

6 0
3 years ago
Which of the following is a radical?<br><br> A. OH<br> B. O<br> C. H<br> D. H2O
Kipish [7]
The correct answer is A) OH.
6 0
3 years ago
An acentric fragment is one result of crossing-over between a normal chromosome and a chromosome that has undergone what kind of
Crank

Answer:

paracentric inversion

Explanation:

A paracentric inversion happens as a result of a portion of one chromosome , or a packet of genetic information, which is flipped such that there are changes in the order of genetic information. Every of the chromosome has a part that is near the middle which is referred to as a centromere. Paracentric inversions do not include the involvement of the centromere of a chromosome.

3 0
3 years ago
At a neuromuscular junction Group of answer choices neurotransmitters are released. actin and myosin filaments slide past one an
const2013 [10]

Answer:

Neurotransmitters are released

Explanation:

At a neuromuscular junction, action potential that arrives there causes the release of the acetylcholine into the synapse. This then binds to the receptors that span across the surface of the motor end plate triggering muscle contraction with the release of calcium.

It acts as a transmission passageway for action potential between the end of a motor nerve and a muscle.

4 0
3 years ago
Explain how active transport helps a nerve cell maintain its resting potential.
Aliun [14]
<span>Active transport is a process requiring energy in which a substance crosses the cell membrane.  When the nerve cell is in its resting potential, there are the positively charged sodium ions and the negatively charged potassium ions. During depolarization, the neuron fires, wherein the active transport plays its role: the positive ions are forced in and the negative ions are forced out. When depolarization is done, these ions are again back to normal through active transport.</span>
6 0
3 years ago
Read 2 more answers
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