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3 years ago

A group of tissues in which small blood vessels from the mother and offspring intertwine but do not connect is the:

Biology

1 answer:

MaRussiya [10]3 years ago

5 0

Solution:

nervous system, digestive system, and umbilical cord. A group of tissues in which small blood vessels from the mother and offspring intertwine but do not connect.

This is the required answer.

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A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a t

Free_Kalibri [48]

Answer:

option D

Explanation:

There are four possible blood groups (A, B, AB, O) and six possible genotypes (AA, AO, BB, BO, AB, OO). Since the mother's bloodgroup is blood type A, then her genotype cannot be IAIB, ii(OO) or IBIB. Thus, we are left with the possible genotypes of IAIA (AA) and IAi (AO).

For her to produce a daughter with blood type O (OO), she has to be an heterozygote with the AO, contributing O so that the father assuming he is of blood type A or B negative (AO or BO) can contribute the second O.

For her to produce a son with type B negative which can only be of genotype BO since the mother is an AO (type A positive), he can only get the type B negative (BO) if his father is blood type B negative. this occurs with the mother contributing the O and the father contributing the B and the rhesus negative factor.

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3 years ago

Before using any chemical in the lab why should one first read the material safety data sheet

olga nikolaevna [1]

Answer:so you wont have any problems with your experiment

Explanation:

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3 years ago

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Which statement about control of glycogen metabolism is INCORRECT? Which statement about control of glycogen metabolism is INCOR

GuDViN [60]

Answer:

Glycogen synthase is phosphorylated at only one site.

Explanation:

Glycogen synthase has multiple sites where phosphorylation can occur. Glycogen synthase may have 9 or more sites where it can be phosphorylated as a result of which it's activity is down regulated. It simply means that the regulation of this enzyme does not occur through binary on/off switching, in fact it's activity is modulated over a wide range in response to various signals.

In contrast to glycogen phosphorylase which gets activated when it is phosphorylated at it's serine residues, glycogen synthase gets inactivated by phosphorylation.

As soon as another enzyme GSK3β phosphorylates glycogen synthase, it gets inactivated as a result of which glycogen synthesis halts in the liver.

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3 years ago

Question 15 (1 point) Which of the following demonstrates positive phototropism? bean plants twisting around a bean pole 12 a ho

Pavlova-9 [17]

Given what we know, we can confirm that among the options listed, the more appropriate example of positive phototropism is the houseplant growing towards the window.

<h3>What is positive phototropism?</h3>

This is a photosensitive reaction that occurs in plants.
Positive phototropism is described as the growth of plants towards the source of light.
While negative phototropism is when the plants lean away from the light.
Sunflowers and bananas, which lean towards the sun as they grow, are prime examples of positive phototropism.

Therefore, given the definition of positive phototropism as the growth of an organism towards a source of light, we can confirm that the option stating that the houseplant grows towards the window is the best example of this concept, given that the window is the source of light for the plant.

To learn more about phototropism visit:

brainly.com/question/16915126?referrer=searchResults

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2 years ago

Gases are NOT considered matter because they cannot be seen. True or False

zhuklara [117]

Answer:
False. Gases have no fixed shape or fixed volume but they can take up the space in a container.

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2 years ago

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