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2 years ago

What is a biological tropism?

Biology

1 answer:

kondor19780726 [428]2 years ago

4 0

Answer:

Explanation:

Living organisms adapt to their moves and positions in response to the environmental changes for their protection or to their advantage. When an entity reacts to the changes in its surroundings, it is referred to as stimulus while the reaction to the stimulus is referred to as a response. Common stimuli are sound, light, air, heat, smell, taste, water and gravity.

Think of burning your finger of fracturing your bone without any pain sensation. It may certainly sound like a superpower or an ideal situation, however, when it comes to the standpoint of survival, it can be disastrous.

It is a characteristic behaviour of living entities to respond to stimuli with the intervention of the Nervous System. It is an organ system ascribed to send signals from the spinal cord and the brain throughout the body and then back from all the body parts to the brain. Neuron acts as the mediator and is the basic signalling unit of the Nervous system.

Pain is the body’s way of letting us know that something is not right. It can prevent further injuries or push us to seek medical attention. Moreover, all of this is possible because humans can respond and react to stimuli due to control and coordination among the various organs and organ systems.

Control and Coordination in simple multicellular organisms take place through only the Nervous system which coordinates activities of our body. It is the control system for all our actions, thinking, and behaviour.

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Nontlowerng plants that disperse the feds 'n ones are called. A gymnosperms. B ANGIOSPERMS C. CARBONIFEROUS. D. SUBCUTANEOUS

WARRIOR [948]

Answer:

A gymnosperms

Explanation:

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6 0

4 years ago

Which of these is the source of the variation in wing color within the Peppered Moth population?

omeli [17]

Answer:

Genetic variation

Explanation:

It could lead to natural selection, but natural selection isn't the cause. Many years down the road you could see a particular variation having a higher population, which is the result of natural selection/survival of the fittest via better camouflaging from predators.

4 0

3 years ago

Help please for science

Lostsunrise [7]

The answer is the second 1

6 0

3 years ago

Read 2 more answers

Each of the following phrases describes the structure, function, or regulation of either the hypothalamus, posterior pituitary,

juin [17]

Answer:

1) Hypothalmus: .D) Synthesizes some hormones that are released into blood vessels bound for another gland - G) Synthesizes oxytocin and ADH - H) Integrates nervous and endocrine systems.

2) Posterior Pituitary Gland: A) Releases oxytocin - F) Is an extension of the Hypothalmus

3) Anterior Pituitary Gland: B) Synthesizes and releases PRL - C) Synthesizes and releases TSH - E) Regulated by hormones released into portal blood vessels

Explanation:

The hypothalamus is the source of at least nine hormones that act stimulating on inhibiting other hormones secretion.

The first hypothalamic hormone discovered is the thyrotropin-releasing hormone, TRH, that stimulates the thyrotropin release by the hypophysis. Another important hormone is the gonadotrophin-releasing hormone, GnRH, that controls the release of gonadotrophic hormones, such as LH and FSH. The somatostatin hormone inhibits the release of somatotrophin hormone from the hypophysis. The oxytocin and the antidiuretic hormone are also secreted and released by the hypothalamus and collected by the posterior hypophysis from where they are then released again to the system.

The hypothalamus secretes hormones directly into capillaries forward to the anterior hypophysis. Oxytocin and antidiuretic hormone, instead, go to the posterior hypophysis through nerve fibers.

The hypophysis gland, also known as the pituitary gland, is located under the hypothalamus which controls the hypophysis. It is considered to be the master gland as it acts as a source of hormones that stimulates different organs. The hypophysis is conformed of three lobules: anterior, intermediate, and posterior.

The anterior lobule releases somatotrophin, prolactin, trophic hormones such as thyrotropin or TSH, ACTH, and gonadotrophins such as FSH and LH.

The posterior lobule collects and release the hormones secreted by the hypothalamus, such as oxytocin and ADH.

The hypophysis and the hypothalamus are both controlled by other parts of the nervous system.

4 0

3 years ago

Rank from the first to the last steps to describe the correct order of follicular development.

lisov135 [29]

Stages of follicular development include in ovulation:

Primordial follicle

Primary follicle

Secondary follicle

Vesicular follicle

Ruptured follicle

Corpus luteum

Corpus albicans

The follicular phase (i.e., follicle formation) starts on day one of a typical 28-day cycle, which is marked by the beginning of menstruation, and lasts until today (i.e., ovulation). At this point, the antral follicle is FSH-dependent and starts to compete for the hormone with other growing follicles.

Before an ovarian follicle releases its ovum, it goes through a number of unique phases. A limited number of primordial follicles emerge in the fetal ovary throughout the course of the first five months of development. The oocytes in these follicles are enclosed in a single layer of squamous follicular cells.

There are only a certain number of primordial follicles that are stimulated to form at the beginning of each menstrual cycle. The early primary follicle, which has a core oocyte surrounded by a single layer of cuboidal-shaped follicular cells, is the earliest evident histological stage.

When a follicular antrum is seen within the granulosa layer, secondary follicles can be distinguished from primary follicles. Hyaluronan and proteoglycan-rich fluid is found in the antrum.

learn more about ovulation here: brainly.com/question/941817

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6 0

2 years ago