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Alexandra [31]
3 years ago
11

Which statement about sexual and asexual reproduction is true? *

Biology
1 answer:
weqwewe [10]3 years ago
8 0

Answer:

The answer is A. There is more genetic variation in organisms that reproduce sexually than those that reproduce asexually.

Explanation:

This is because offspring with two parents can get genetics from both family's which means there is a chance for many different types of characteristics.

If an offspring only has one parent however, the offspring will only get those genetics from the parent which means there are not many possibilities for offspring to look or act different then their parent.

Hope this helps! Have a good day! or don't...it's up to you- <3

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According to the gate control theory of pain, how do gate neurons inhibit pain neurons? select one:
harkovskaia [24]

The gate control theory of pain states that the experience of pain is dependent on the complex interaction of the central and the peripheral nervous system. This theory was given by Ronald Melzack and Patrick Wall.

Usually, when a person experiences pain, the neurons transmits the message from the area of damage along the peripheral nervous system to the spinal cord and the brain.  The gate control theory suggests that the neurons encounter the 'nerve gates' while transmitting the pain messages in the spinal cord. These opening and closing of these gates is dependent on the multiple factors.  

The basket cells are the multipolar, inhibitory interneurons . Endorphins are the neuropeptide and the peptide hormones, which are secreted by the central nervous system and the pituitary gland. These structures have no relation with the transmission of the pain.

The hyperpolarization of the neurons by the opiate receptors resulting in the release of the substance P, which is a neurotransmitter involved with pain.

Hence, the correct answer is 'by releasing substance P'.

5 0
3 years ago
Match each organism with its phylum Pines Ephedra Palm-like plants Trees with fan-shaped leaves A. Gnetophyta B. Ginkgophyta C.
solong [7]

Answer:

Ginkgophyta

Explanation:

Gymnosperms are cone-bearing trees or Woody plants, which do not different greatly in their structure from the Woody angiosperms. Gymnosperms do not produce flowers but as seed plants that bear their seeds on scale-like leaves which are arranged spirally to form cones. The seeds are termed naked seeds because they are exposed to the air on the surfaces of the cone scales.

Gymnpsperms are grouped into four major divisions namely:

*Ginkgophyta

*Cycadophyta

*Corniferophyta

*Gnetophyta

1)DIVISION GINKGOPHYTA:The ginkgo tree cared maiden hair is the only surviving member of this division. It is found in the Orient(China and Japan) where it is cultivated as an ornamental tree because of the fan-like leaves. The leaves are *fan-shaped* with long petrioles.

2)DIVISION CYCADOPHYTA:The cycads abound in the tropics, mainly as ornamental plants. They are *palm tree-like* plants with a crowded crown of palm fronds.The leaves of Cuba's are deep green,waxy with large petioles.

DIVISION CONIFEROPHYTA:This is the largest group of Gymnosperms as it includes some of most economically exploited plants such as *pines* and Jupiter's. The pine tree is important as Christmas tree and conifers are generally important in the production of wood and paper

DIVISION GNETOPHYTA:This is the group of very unique Gymnosperms made up of three genera:Gnetum,*Ephedra* and Welwitschia.

Ephedra is a profusely branched shrub found in desert regions. It has whorl-like, scale-like, or needle -like leaves and jointed stem.

Hence, matching each with its phylum, we have:

Gingkophyta:Fan-shaped leaves

Cycadophyta-Palm-like leaves

Coniferophyta:Pine

Gnetophyta:Ephedra

5 0
3 years ago
Lipophilic hormones function by activating cAMP.
AveGali [126]

Answer:

Option B

Explanation:

Water soluble hormones associate with the G protein of cAMP. This G protein is intra-cellular i.e found inside the cell.  

However in case of lipid derived hormones, the hormone has to diffuse through the cell across the plasma membrane to bind to DNA or the intra-cellular receptors.This regulates the gene transcription and induces protein production that affects the cell functioning for a long time.

Hence, option B is correct

7 0
3 years ago
How does independent assortment increase genetic variation in Meiosis?
KIM [24]

Answer:

Independent assortment produce new combinations of alleles.

Explanation:

In meiosis I, crossing over during prophase and independent assortment during anaphase creates sets of chromosomes with new combinations of alleles. Genetic variation is also introduced by random fertilization of the gametes produced by meiosis. It results in gametes that have unique combinations of chromosomes.

3 0
2 years ago
Evolution is all of the following
frosja888 [35]

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3 0
3 years ago
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