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aleksandr82 [10.1K]
2 years ago
13

Choose all the answers that apply.

Biology
2 answers:
Angelina_Jolie [31]2 years ago
8 0

Answer:

*Release oxygen in the air

*Make their own food using photosynthesis

*Get their energy directly from the sun

*Are the start of all good chains

geniusboy [140]2 years ago
3 0

Answer:

- release oxygen Into the air

- make their own food using photosynthesis

- get their energy directly from the sun

- are the start of all food chains

Explanation:

Producers are organisms, usually photosynthetic, that create their own food using the process of photosynthesis and are the basis of all food chains and webs. The most common producers that we know of are plants.

During photosynthesis, plants and other producers capture light energy from the sun and convert that into usable energy to create sugar, which is their own food. Another input for this process is carbon dioxide, whereas a byproduct of this system is actually oxygen.

Hope this helps!

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Body cells that contain the full number of chromosomes, 46 in humans, are called
masha68 [24]

Answer:

somatic cells?

Explanation:

3 0
3 years ago
John and sue are expecting a child, but are concerned about a rare autosomal recessive disease that is present in both of their
Vladimir79 [104]
Attached is the pedigree. I found the exercise on the internet.

The individuals that are missing a symbol are: II-5, II-6, II-8, III-10, III-11, III-12, III-13.

The individual II-5 would have the half black/half white square. A square because in the introductory text says that it's John's paternal grandmother (I-2) that has the disease. Half black/half white because his mother had the disease so she passed one allele that's necessarily a disease allele, and his father doesn't carry the disease or manifest it which means that from him, John's father (II-5) only received a normal allele.

The individual II-6 would have a question mark in a circle. A circle because she is John's mother once his father is the individual II-5. A question mark because we don't have information as for the manifestation of the disease in her, though we do know that she is either a carrier of the disease or inflicted by the disease because she has a daughter (John's sister) that has the disease meaning that John's sister received two alleles for the disease.

The individual II-8 would have the half black/half white circle. A circle because she is Sue's mother once her father is the individual II-7 (a square). Half black/half white because her father had the disease so he passed one allele that's necessarily a disease allele, and her mother doesn't carry the disease or manifest it which means that from her, Sue's mother (II-8) could only received a normal allele.

The individual III-10 would have a question mark in a circle. A circle because she is John's sister as said in the introductory text. A question mark because we can't affirm whether she is a carrier of one disease allele or does not carry the disease at all. We know by the introductory text that she doesn't have any signs of the disease but she could've have received a disease allele from her father or her mother if her mother is simply a carrier of one disease allele, or would definitely received a disease allele from her mother, and not from her father, if her mother has the disease.

John, the individual III-11 would have a question mark in a square. A square because is John, a male. A question mark because we can't affirm whether he is a carrier of one disease allele or does not carry the disease at all. We gather, by the introductory text, that he doesn't have signs of the disease but he could've have received a disease allele from his father or his mother if his mother is simply a carrier of one disease allele, or would definitely received a disease allele from his mother, and not from his father, if his mother has the disease.

Sue, the individual III-12 would have a question mark in a circle. A circle because is Sue, a female. A question mark because we can't affirm whether she is a carrier of one disease allele or does not carry the disease at all. By the introductory text, we gather that she doesn't have signs of the disease, but she could've have received a disease allele from her mother, once her mother is a carrier of a disease allele, turning her into a carrier as well, or could've received the normal allele from her mother. From her father she only received a normal allele.

The individual III-13 would have a question mark in a square. A square because he is Sue's brother according to the introductory text. A question mark because we can't affirm whether he is a carrier of one disease allele or does not carry the disease at all. We know, by the introductory text, that he doesn't show any signs of the disease, but he could've have received a disease allele from his mother, once his mother is a carrier of a disease allele, turning him into a carrier as well, or could've received the normal allele from his mother. From his father he only received a normal allele.

8 0
3 years ago
: Hair color is a human trait controlled by 7 genes with a Heritability of 1. Based on this, provide a 1-2 sentence explanation
andrezito [222]

Answer:

Polygenic trait

Explanation:

A polygenic trait is a type of trait whose phenotype observed is affected by more than one genes i.e expression of the trait is controlled by not only a single gene but many. These traits include height or skin color and they display that display a continuous distribution; the hair color is controlled by 7 genes as described which is more than more.

8 0
3 years ago
Which of the following is true about sexual reproduction?
VikaD [51]

Answer:

C. Haploid Cells formed by meiosis combine to produce a diploid cell.

5 0
3 years ago
What is the effect of expressing a dominant active form of the small GTPase Rac1 in a human neutrophil
yan [13]

Answer:

The neutrophil forms multiple lamellipodia extensions

Explanation:

Neutrophils are white blood cells (granulocytes) which comprise the first line of defense in the innate immune system. The lamellipodium (in plural, lamellipodia) is a cytoskeletal actin extension found in mobile cells, whose main functions are cell motility and migration.  Rac1 is a member of the Rho GTPase protein family which is involved in actin-myosin cytoskeletal reorganization of neutrophil cells in response to microorganism infections. In this regard, it has been shown that Rac1 controls the initial uncapping of actin ends in order to regulate cytoskeleton dynamics, thus regulating lamellipodia formation. By using mice as models, researchers observed that Rac1 constitutive activation may lead to the formation of multiple lamellipodia in neutrophils.

8 0
2 years ago
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