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g100num [7]
3 years ago
11

Dr. mason studies the effects of exposure to marijuana on fetal development. dr. mason's field is

Biology
1 answer:
mariarad [96]3 years ago
7 0
Teratology. This is a field within embryology (study of development of embryo and fetuses) that studies the effect of congenital abnormalities on the developing embryo and also teratogens ( substances that affect the normal development of embryo/fetus)
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Complete the punnett square below of a cross between a carrier mother (a female who carries one copy of the recessive allele and
IgorLugansk [536]
Hemophilia is a genetic disorder that inherited by X-linked recessive pattern. A daughter needs 2 genes to have the disease(or 1 gene to become carrier) but a son only needs to get 1 defect genes from his mother(X  gene in male must come from mother). If Xh defected gene and X normal genes, the <span>punnett square </span>would be:

                       Father(XY)
                        X         Y
Mother   Xh    XhX      XhY    ------>XhX= carrier , XhY= sick
 (Xh X)     X     XX        XY      ------>healthy
6 0
3 years ago
during a long race one athlete did not drink any liquid towards the end of the race the amount of sweat he produced began to fal
Daniel [21]

Answer:

He is starting to suffer from dehydration and heat exhaustion

Explanation:His body can no longer produce enough sweat to cool him down simply because of the fact that he did not drink any liquids but it is important he gets hydrated soon or he may need to go to the emergency room

6 0
3 years ago
Need this bad please help me
svlad2 [7]

50% if the B blood type parent is heterozygous

3 0
2 years ago
Describe the unique appearance of diatoms. what chemical compound composes their outer covering, and what is this shell called?
Natasha2012 [34]
Diatom Cells are enclosed in a cell wall made up of silica or hydrated silicon dioxide namely frustule. The frustule has small walls where nutrients enter, enabling it to perform photosynthesis the same way plants do.
6 0
3 years ago
Each of the following relates to an aspect of evolution by natural selection. Explain the following. ii. Natural selection and t
dlinn [17]

         The first one, ii. Natural selection and the formation of inseticide resistant insects or antibiotic resistant bacteria.

          This can be explained in very simple way. As we all know, natural selection works in a way that only that adapted living beings are going to survive through a specific environment, whether it's because they can grab their food without too much work, or even that they can adapt to the weather. When we use inseticide, we are killing lots of non-resistant insects, and what's left are those that are resistant to this inseticide, and they'll reproduce again, and again we'll go through the same process, but remember, this insect is now stronger and more resistant that before.

            The second case, iii. speciation and isolation give three examples how it may occur.

            Well. the allopatric speciation and isolation will happen when theres a geographic barrier between one species. This one then is divided into two diffent habitats, but what can divide than could be a mountain, a tree, a river, a rock, anything. And this could be too called as a geographic isolation, because in this new environment, species are going to develop in a different way.

4 0
3 years ago
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